31321101300021 has 24 divisors (see below), whose sum is σ = 48739873037856. Its totient is φ = 19267339739040.

The previous prime is 31321101299977. The next prime is 31321101300037. The reversal of 31321101300021 is 12000310112313.

31321101300021 is a `hidden beast` number, since 31 + 321 + 10 + 1 + 300 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 31321101300021 - 2¹³ = 31321101291829 is a prime.

It is a super-2 number, since 2×31321101300021² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31321101299967 and 31321101300003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321101300121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49574595 + ... + 50202416.

It is an arithmetic number, because the mean of its divisors is an integer number (2030828043244).

Almost surely, 2^{31321101300021} is an apocalyptic number.

It is an amenable number.

31321101300021 is a deficient number, since it is larger than the sum of its proper divisors (17418771737835).

31321101300021 is a wasteful number, since it uses less digits than its factorization.

31321101300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99779713 (or 99779710 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31321101300021 its reverse (12000310112313), we get a palindrome (43321411412334).

The spelling of 31321101300021 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred one million, three hundred thousand, twenty-one".