20003111222100 has 144 divisors (see below), whose sum is σ = 62284712648256. Its totient is φ = 4938087168000.

The previous prime is 20003111222093. The next prime is 20003111222167. The reversal of 20003111222100 is 122211130002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20003111222100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31837906 + ... + 32460105.

It is an arithmetic number, because the mean of its divisors is an integer number (432532726724).

Almost surely, 2^{20003111222100} is an apocalyptic number.

20003111222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003111222100 is an abundant number, since it is smaller than the sum of its proper divisors (42281601426156).

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

20003111222100 is a wasteful number, since it uses less digits than its factorization.

20003111222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64298106 (or 64298099 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20003111222100 its reverse (122211130002), we get a palindrome (20125322352102).

The spelling of 20003111222100 in words is "twenty trillion, three billion, one hundred eleven million, two hundred twenty-two thousand, one hundred".