21122200102212 has 36 divisors (see below), whose sum is σ = 58246066949616. Its totient is φ = 6400666697520.

The previous prime is 21122200102207. The next prime is 21122200102249. The reversal of 21122200102212 is 21220100222112.

It is a happy number.

21122200102212 is a `hidden beast` number, since 211 + 2 + 220 + 0 + 10 + 221 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×21122200102212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26669444178 + ... + 26669444969.

It is an arithmetic number, because the mean of its divisors is an integer number (1617946304156).

Almost surely, 2^{21122200102212} is an apocalyptic number.

21122200102212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21122200102212 is an abundant number, since it is smaller than the sum of its proper divisors (37123866847404).

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

21122200102212 is a wasteful number, since it uses less digits than its factorization.

21122200102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53338889168 (or 53338889163 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21122200102212 its reverse (21220100222112), we get a palindrome (42342300324324).

The spelling of 21122200102212 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred million, one hundred two thousand, two hundred twelve".