20311212113000 has 64 divisors (see below), whose sum is σ = 47774497090320. Its totient is φ = 8082388992000.

The previous prime is 20311212112943. The next prime is 20311212113063. The reversal of 20311212113000 is 31121211302.

It can be written as a sum of positive squares in 8 ways, for example, as 88329028804 + 20222883084196 = 297202^2 + 4496986^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20311212113000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52426721 + ... + 52812720.

Almost surely, 2^{20311212113000} is an apocalyptic number.

20311212113000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311212113000 is an abundant number, since it is smaller than the sum of its proper divisors (27463284977320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311212113000 is a wasteful number, since it uses less digits than its factorization.

20311212113000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105239655 (or 105239641 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20311212113000 its reverse (31121211302), we get a palindrome (20342333324302).

The spelling of 20311212113000 in words is "twenty trillion, three hundred eleven billion, two hundred twelve million, one hundred thirteen thousand".