21013332020031 has 16 divisors (see below), whose sum is σ = 31146311813120. Its totient is φ = 12514143137760.

The previous prime is 21013332020017. The next prime is 21013332020039. The reversal of 21013332020031 is 13002023331012.

It is not a de Polignac number, because 21013332020031 - 2⁷ = 21013332019903 is a prime.

It is a super-3 number, since 3×21013332020031³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013332020039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8690375971 + ... + 8690378388.

It is an arithmetic number, because the mean of its divisors is an integer number (1946644488320).

Almost surely, 2^{21013332020031} is an apocalyptic number.

21013332020031 is a deficient number, since it is larger than the sum of its proper divisors (10132979793089).

21013332020031 is a wasteful number, since it uses less digits than its factorization.

21013332020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17380754406.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21013332020031 its reverse (13002023331012), we get a palindrome (34015355351043).

The spelling of 21013332020031 in words is "twenty-one trillion, thirteen billion, three hundred thirty-two million, twenty thousand, thirty-one".