21100220211012 has 24 divisors (see below), whose sum is σ = 49235634938112. Its totient is φ = 7033151340000.

The previous prime is 21100220210999. The next prime is 21100220211029. The reversal of 21100220211012 is 21011202200112.

It is a junction number, because it is equal to n+sod(n) for n = 21100220210982 and 21100220211000.

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, 31580239 + ... + 32241462.

It is an arithmetic number, because the mean of its divisors is an integer number (2051484789088).

Almost surely, 2^{21100220211012} is an apocalyptic number.

It is an amenable number.

21100220211012 is an abundant number, since it is smaller than the sum of its proper divisors (28135414727100).

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

21100220211012 is a wasteful number, since it uses less digits than its factorization.

21100220211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63849259 (or 63849257 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100220211012 its reverse (21011202200112), we get a palindrome (42111422411124).

The spelling of 21100220211012 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, two hundred eleven thousand, twelve".