21134301431212 has 12 divisors (see below), whose sum is σ = 39160617357960. Its totient is φ = 9945553614656.

The previous prime is 21134301431129. The next prime is 21134301431237. The reversal of 21134301431212 is 21213410343112.

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, 155399275162 + ... + 155399275297.

It is an arithmetic number, because the mean of its divisors is an integer number (3263384779830).

Almost surely, 2^{21134301431212} is an apocalyptic number.

It is an amenable number.

21134301431212 is a deficient number, since it is larger than the sum of its proper divisors (18026315926748).

21134301431212 is a wasteful number, since it uses less digits than its factorization.

21134301431212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310798550480 (or 310798550478 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 21134301431212 its reverse (21213410343112), we get a palindrome (42347711774324).

The spelling of 21134301431212 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred one million, four hundred thirty-one thousand, two hundred twelve".