20021102112 has 96 divisors (see below), whose sum is σ = 58553155584. Its totient is φ = 5937900800.

The previous prime is 20021102107. The next prime is 20021102149. The reversal of 20021102112 is 21120112002.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 152064 + ... + 251327.

It is an arithmetic number, because the mean of its divisors is an integer number (609928704).

Almost surely, 2^20021102112 is an apocalyptic number.

20021102112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021102112 is an abundant number, since it is smaller than the sum of its proper divisors (38532053472).

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

20021102112 is a wasteful number, since it uses less digits than its factorization.

20021102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403462 (or 403454 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021102112 its reverse (21120112002), we get a palindrome (41141214114).

The spelling of 20021102112 in words is "twenty billion, twenty-one million, one hundred two thousand, one hundred twelve".