21023211112012 has 192 divisors, whose sum is σ = 40236134400000. Its totient is φ = 9586495556352.

The previous prime is 21023211111971. The next prime is 21023211112019. The reversal of 21023211112012 is 21021111232012.

It is a super-2 number, since 2×21023211112012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21023211112019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10516862989 + ... + 10516864987.

It is an arithmetic number, because the mean of its divisors is an integer number (209563200000).

Almost surely, 2^{21023211112012} is an apocalyptic number.

It is an amenable number.

21023211112012 is a deficient number, since it is larger than the sum of its proper divisors (19212923287988).

21023211112012 is a wasteful number, since it uses less digits than its factorization.

21023211112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21023211112012 its reverse (21021111232012), we get a palindrome (42044322344024).

The spelling of 21023211112012 in words is "twenty-one trillion, twenty-three billion, two hundred eleven million, one hundred twelve thousand, twelve".