20111023312012 has 48 divisors (see below), whose sum is σ = 35403674503680. Its totient is φ = 9995811134400.

The previous prime is 20111023311997. The next prime is 20111023312013. The reversal of 20111023312012 is 21021332011102.

It is a super-2 number, since 2×20111023312012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20111023312013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3198823533 + ... + 3198829819.

It is an arithmetic number, because the mean of its divisors is an integer number (737576552160).

Almost surely, 2^{20111023312012} is an apocalyptic number.

It is an amenable number.

20111023312012 is a deficient number, since it is larger than the sum of its proper divisors (15292651191668).

20111023312012 is a wasteful number, since it uses less digits than its factorization.

20111023312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462 (or 10460 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20111023312012 its reverse (21021332011102), we get a palindrome (41132355323114).

The spelling of 20111023312012 in words is "twenty trillion, one hundred eleven billion, twenty-three million, three hundred twelve thousand, twelve".