56211021100 has 36 divisors (see below), whose sum is σ = 131360835424. Its totient is φ = 20754838080.

The previous prime is 56211021091. The next prime is 56211021103. The reversal of 56211021100 is 112011265.

It is not an unprimeable number, because it can be changed into a prime (56211021103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21618324 + ... + 21620923.

Almost surely, 2^56211021100 is an apocalyptic number.

56211021100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56211021100 is an abundant number, since it is smaller than the sum of its proper divisors (75149814324).

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

56211021100 is a wasteful number, since it uses less digits than its factorization.

56211021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43239274 (or 43239267 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 56211021100 its reverse (112011265), we get a palindrome (56323032365).

The spelling of 56211021100 in words is "fifty-six billion, two hundred eleven million, twenty-one thousand, one hundred".