21201112088 has 16 divisors (see below), whose sum is σ = 42809938080. Its totient is φ = 9785128608.

The previous prime is 21201112087. The next prime is 21201112139. The reversal of 21201112088 is 88021110212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201112081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101928320 + ... + 101928527.

It is an arithmetic number, because the mean of its divisors is an integer number (2675621130).

Almost surely, 2^21201112088 is an apocalyptic number.

It is an amenable number.

21201112088 is an abundant number, since it is smaller than the sum of its proper divisors (21608825992).

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

21201112088 is a wasteful number, since it uses less digits than its factorization.

21201112088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203856866 (or 203856862 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 26.

The spelling of 21201112088 in words is "twenty-one billion, two hundred one million, one hundred twelve thousand, eighty-eight".