21131022143212 has 24 divisors (see below), whose sum is σ = 37790839133712. Its totient is φ = 10334844062400.

The previous prime is 21131022143191. The next prime is 21131022143213. The reversal of 21131022143212 is 21234122013112.

It is not an unprimeable number, because it can be changed into a prime (21131022143213) 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, 150495739 + ... + 150636082.

It is an arithmetic number, because the mean of its divisors is an integer number (1574618297238).

Almost surely, 2^{21131022143212} is an apocalyptic number.

It is an amenable number.

21131022143212 is a deficient number, since it is larger than the sum of its proper divisors (16659816990500).

21131022143212 is a wasteful number, since it uses less digits than its factorization.

21131022143212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301132209 (or 301132207 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21131022143212 its reverse (21234122013112), we get a palindrome (42365144156324).

The spelling of 21131022143212 in words is "twenty-one trillion, one hundred thirty-one billion, twenty-two million, one hundred forty-three thousand, two hundred twelve".