1011211421 has 8 divisors (see below), whose sum is σ = 1113261600. Its totient is φ = 910848240.

The previous prime is 1011211387. The next prime is 1011211423. The reversal of 1011211421 is 1241121101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011211421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011211396 and 1011211405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211423) 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 7 ways as a sum of consecutive naturals, for example, 420491 + ... + 422888.

It is an arithmetic number, because the mean of its divisors is an integer number (139157700).

Almost surely, 2^1011211421 is an apocalyptic number.

1011211421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011211421 is a deficient number, since it is larger than the sum of its proper divisors (102050179).

1011211421 is a wasteful number, since it uses less digits than its factorization.

1011211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843499.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1011211421 is about 31799.5506414792. The cubic root of 1011211421 is about 1003.7232604601.

Adding to 1011211421 its reverse (1241121101), we get a palindrome (2252332522).

The spelling of 1011211421 in words is "one billion, eleven million, two hundred eleven thousand, four hundred twenty-one".