1120210021 has 12 divisors (see below), whose sum is σ = 1309864332. Its totient is φ = 955196928.

The previous prime is 1120209991. The next prime is 1120210027. The reversal of 1120210021 is 1200120211.

It can be written as a sum of positive squares in 2 ways, for example, as 125753796 + 994456225 = 11214^2 + 31535^2 .

It is not a de Polignac number, because 1120210021 - 2⁵ = 1120209989 is a prime.

It is a super-2 number, since 2×1120210021² = 2509740982297640882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120210027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49770 + ... + 68683.

It is an arithmetic number, because the mean of its divisors is an integer number (109155361).

Almost surely, 2^1120210021 is an apocalyptic number.

It is an amenable number.

1120210021 is a deficient number, since it is larger than the sum of its proper divisors (189654311).

1120210021 is a wasteful number, since it uses less digits than its factorization.

1120210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118660 (or 118653 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1120210021 is about 33469.5387031253. The cubic root of 1120210021 is about 1038.5637289801.

Adding to 1120210021 its reverse (1200120211), we get a palindrome (2320330232).

The spelling of 1120210021 in words is "one billion, one hundred twenty million, two hundred ten thousand, twenty-one".