21120011102000 has 80 divisors (see below), whose sum is σ = 52313752580544. Its totient is φ = 8241955520000.

The previous prime is 21120011101967. The next prime is 21120011102009. The reversal of 21120011102000 is 20111002112.

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

It is not an unprimeable number, because it can be changed into a prime (21120011102009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128698556 + ... + 128862555.

Almost surely, 2^{21120011102000} is an apocalyptic number.

21120011102000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120011102000 is an abundant number, since it is smaller than the sum of its proper divisors (31193741478544).

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

21120011102000 is a wasteful number, since it uses less digits than its factorization.

21120011102000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257561175 (or 257561159 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21120011102000 its reverse (20111002112), we get a palindrome (21140122104112).

The spelling of 21120011102000 in words is "twenty-one trillion, one hundred twenty billion, eleven million, one hundred two thousand".