21131311102212 has 24 divisors (see below), whose sum is σ = 50638997777536. Its totient is φ = 6853398195168.

The previous prime is 21131311102211. The next prime is 21131311102243. The reversal of 21131311102212 is 21220111313112.

It is a super-2 number, since 2×21131311102212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21131311102211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23796521068 + ... + 23796521955.

Almost surely, 2^{21131311102212} is an apocalyptic number.

It is an amenable number.

21131311102212 is an abundant number, since it is smaller than the sum of its proper divisors (29507686675324).

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

21131311102212 is a wasteful number, since it uses less digits than its factorization.

21131311102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47593043067 (or 47593043065 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 21131311102212 its reverse (21220111313112), we get a palindrome (42351422415324).

The spelling of 21131311102212 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred eleven million, one hundred two thousand, two hundred twelve".