21301322132 has 6 divisors (see below), whose sum is σ = 37277313738. Its totient is φ = 10650661064.

The previous prime is 21301322129. The next prime is 21301322153. The reversal of 21301322132 is 23122310312.

It can be written as a sum of positive squares in only one way, i.e., 21226741636 + 74580496 = 145694^2 + 8636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662665263 + ... + 2662665270.

It is an arithmetic number, because the mean of its divisors is an integer number (6212885623).

Almost surely, 2^21301322132 is an apocalyptic number.

It is an amenable number.

21301322132 is a deficient number, since it is larger than the sum of its proper divisors (15975991606).

21301322132 is a wasteful number, since it uses less digits than its factorization.

21301322132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325330537 (or 5325330535 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21301322132 its reverse (23122310312), we get a palindrome (44423632444).

The spelling of 21301322132 in words is "twenty-one billion, three hundred one million, three hundred twenty-two thousand, one hundred thirty-two".