21000302212131 has 24 divisors (see below), whose sum is σ = 33985747074864. Its totient is φ = 12383470589760.

The previous prime is 21000302212129. The next prime is 21000302212193. The reversal of 21000302212131 is 13121220300012.

21000302212131 is a `hidden beast` number, since 21 + 0 + 0 + 0 + 302 + 212 + 131 = 666.

It is not a de Polignac number, because 21000302212131 - 2¹ = 21000302212129 is a prime.

It is a super-2 number, since 2×21000302212131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21000302212121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2866540456 + ... + 2866547781.

It is an arithmetic number, because the mean of its divisors is an integer number (1416072794786).

Almost surely, 2^{21000302212131} is an apocalyptic number.

21000302212131 is a deficient number, since it is larger than the sum of its proper divisors (12985444862733).

21000302212131 is a wasteful number, since it uses less digits than its factorization.

21000302212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733088291 (or 5733088288 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21000302212131 its reverse (13121220300012), we get a palindrome (34121522512143).

The spelling of 21000302212131 in words is "twenty-one trillion, three hundred two million, two hundred twelve thousand, one hundred thirty-one".