21100001122212 has 12 divisors (see below), whose sum is σ = 49233335951856. Its totient is φ = 7033333707400.

The previous prime is 21100001122171. The next prime is 21100001122247. The reversal of 21100001122212 is 21222110000112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21100001122191 and 21100001122200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879166713414 + ... + 879166713437.

It is an arithmetic number, because the mean of its divisors is an integer number (4102777995988).

Almost surely, 2^{21100001122212} is an apocalyptic number.

It is an amenable number.

21100001122212 is an abundant number, since it is smaller than the sum of its proper divisors (28133334829644).

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

21100001122212 is a wasteful number, since it uses less digits than its factorization.

21100001122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758333426858 (or 1758333426856 counting only the distinct ones).

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

Adding to 21100001122212 its reverse (21222110000112), we get a palindrome (42322111122324).

The spelling of 21100001122212 in words is "twenty-one trillion, one hundred billion, one million, one hundred twenty-two thousand, two hundred twelve".