21013122012331 has 8 divisors (see below), whose sum is σ = 21083814455760. Its totient is φ = 20942457273888.

The previous prime is 21013122012251. The next prime is 21013122012367. The reversal of 21013122012331 is 13321022131012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21013122012331 - 2²⁹ = 21012585141419 is a prime.

It is a super-2 number, since 2×21013122012331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013122012131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5406216 + ... + 8441173.

It is an arithmetic number, because the mean of its divisors is an integer number (2635476806970).

Almost surely, 2^{21013122012331} is an apocalyptic number.

21013122012331 is a deficient number, since it is larger than the sum of its proper divisors (70692443429).

21013122012331 is a wasteful number, since it uses less digits than its factorization.

21013122012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13852493.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21013122012331 its reverse (13321022131012), we get a palindrome (34334144143343).

The spelling of 21013122012331 in words is "twenty-one trillion, thirteen billion, one hundred twenty-two million, twelve thousand, three hundred thirty-one".