1051150021 has 4 divisors (see below), whose sum is σ = 1052923212. Its totient is φ = 1049376832.

The previous prime is 1051150003. The next prime is 1051150027. The reversal of 1051150021 is 1200511501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1200511501 = 7 ⋅171501643.

It can be written as a sum of positive squares in 2 ways, for example, as 844193025 + 206956996 = 29055^2 + 14386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051150021 - 2⁹ = 1051149509 is a prime.

It is a super-2 number, since 2×1051150021² = 2209832733296600882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1051149977 and 1051150004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051150027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885706 + ... + 886891.

It is an arithmetic number, because the mean of its divisors is an integer number (263230803).

Almost surely, 2^1051150021 is an apocalyptic number.

It is an amenable number.

1051150021 is a deficient number, since it is larger than the sum of its proper divisors (1773191).

1051150021 is an equidigital number, since it uses as much as digits as its factorization.

1051150021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773190.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 1051150021 is about 32421.4438450850. The cubic root of 1051150021 is about 1016.7672935366.

Adding to 1051150021 its reverse (1200511501), we get a palindrome (2251661522).

The spelling of 1051150021 in words is "one billion, fifty-one million, one hundred fifty thousand, twenty-one".