21120000331 has 2 divisors, whose sum is σ = 21120000332. Its totient is φ = 21120000330.

The previous prime is 21120000311. The next prime is 21120000353. The reversal of 21120000331 is 13300002112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120000331 - 2⁵ = 21120000299 is a prime.

It is a super-2 number, since 2×21120000331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21120000311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560000165 + 10560000166.

It is an arithmetic number, because the mean of its divisors is an integer number (10560000166).

Almost surely, 2^21120000331 is an apocalyptic number.

21120000331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120000331 is an equidigital number, since it uses as much as digits as its factorization.

21120000331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21120000331 its reverse (13300002112), we get a palindrome (34420002443).

The spelling of 21120000331 in words is "twenty-one billion, one hundred twenty million, three hundred thirty-one", and thus it is an aban number.