21112002112000 has 80 divisors (see below), whose sum is σ = 52644096925992. Its totient is φ = 8444800819200.

The previous prime is 21112002111979. The next prime is 21112002112093. The reversal of 21112002112000 is 21120021112.

It can be written as a sum of positive squares in 4 ways, for example, as 11631810375936 + 9480191736064 = 3410544^2 + 3078992^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164873517 + ... + 165001516.

Almost surely, 2^{21112002112000} is an apocalyptic number.

21112002112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112002112000 is an abundant number, since it is smaller than the sum of its proper divisors (31532094813992).

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

21112002112000 is an frugal number, since it uses more digits than its factorization.

21112002112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329875066 (or 329875040 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112002112000 its reverse (21120021112), we get a palindrome (21133122133112).

The spelling of 21112002112000 in words is "twenty-one trillion, one hundred twelve billion, two million, one hundred twelve thousand".