21312132301 has 4 divisors (see below), whose sum is σ = 21322700572. Its totient is φ = 21301564032.

The previous prime is 21312132293. The next prime is 21312132313. The reversal of 21312132301 is 10323121312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7494364900 + 13817767401 = 86570^2 + 117549^2 .

It is a cyclic number.

It is not a de Polignac number, because 21312132301 - 2³ = 21312132293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312112301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5281110 + ... + 5285143.

It is an arithmetic number, because the mean of its divisors is an integer number (5330675143).

Almost surely, 2^21312132301 is an apocalyptic number.

It is an amenable number.

21312132301 is a deficient number, since it is larger than the sum of its proper divisors (10568271).

21312132301 is a wasteful number, since it uses less digits than its factorization.

21312132301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10568270.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21312132301 its reverse (10323121312), we get a palindrome (31635253613).

The spelling of 21312132301 in words is "twenty-one billion, three hundred twelve million, one hundred thirty-two thousand, three hundred one".