20111220012004 has 24 divisors (see below), whose sum is σ = 38920094525088. Its totient is φ = 9016238111040.

The previous prime is 20111220011983. The next prime is 20111220012019. The reversal of 20111220012004 is 40021002211102.

It is a super-2 number, since 2×20111220012004² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3130635022 + ... + 3130641445.

It is an arithmetic number, because the mean of its divisors is an integer number (1621670605212).

Almost surely, 2^{20111220012004} is an apocalyptic number.

It is an amenable number.

20111220012004 is a deficient number, since it is larger than the sum of its proper divisors (18808874513084).

20111220012004 is a wasteful number, since it uses less digits than its factorization.

20111220012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261276555 (or 6261276553 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20111220012004 its reverse (40021002211102), we get a palindrome (60132222223106).

The spelling of 20111220012004 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, twelve thousand, four".