20112455421102 has 64 divisors (see below), whose sum is σ = 47718755437824. Its totient is φ = 5581140963840.

The previous prime is 20112455421083. The next prime is 20112455421151.

20112455421102 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 20112455421102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242195508 + ... + 242278535.

It is an arithmetic number, because the mean of its divisors is an integer number (745605553716).

Almost surely, 2^{20112455421102} is an apocalyptic number.

20112455421102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20112455421102 is an abundant number, since it is smaller than the sum of its proper divisors (27606300016722).

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

20112455421102 is a wasteful number, since it uses less digits than its factorization.

20112455421102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484474113.

The product of its (nonzero) digits is 6400, while the sum is 30.

It can be divided in two parts, 2011245 and 5421102, that added together give a palindrome (7432347).

The spelling of 20112455421102 in words is "twenty trillion, one hundred twelve billion, four hundred fifty-five million, four hundred twenty-one thousand, one hundred two".