21312310222132 has 24 divisors (see below), whose sum is σ = 37591912221696. Its totient is φ = 10571771443968.

The previous prime is 21312310222127. The next prime is 21312310222193. The reversal of 21312310222132 is 23122201321312.

It is a junction number, because it is equal to n+sod(n) for n = 21312310222097 and 21312310222106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10460883 + ... + 12331045.

It is an arithmetic number, because the mean of its divisors is an integer number (1566329675904).

Almost surely, 2^{21312310222132} is an apocalyptic number.

It is an amenable number.

21312310222132 is a deficient number, since it is larger than the sum of its proper divisors (16279601999564).

21312310222132 is a wasteful number, since it uses less digits than its factorization.

21312310222132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892727 (or 1892725 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21312310222132 its reverse (23122201321312), we get a palindrome (44434511543444).

The spelling of 21312310222132 in words is "twenty-one trillion, three hundred twelve billion, three hundred ten million, two hundred twenty-two thousand, one hundred thirty-two".