31320133121 has 8 divisors (see below), whose sum is σ = 32996932320. Its totient is φ = 29646171072.

The previous prime is 31320133057. The next prime is 31320133123. The reversal of 31320133121 is 12133102313.

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 31320133121 - 2⁶ = 31320133057 is a prime.

It is a super-2 number, since 2×31320133121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31320133093 and 31320133102.

It is not an unprimeable number, because it can be changed into a prime (31320133123) 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, 686600 + ... + 730793.

It is an arithmetic number, because the mean of its divisors is an integer number (4124616540).

Almost surely, 2^31320133121 is an apocalyptic number.

It is an amenable number.

31320133121 is a deficient number, since it is larger than the sum of its proper divisors (1676799199).

31320133121 is a wasteful number, since it uses less digits than its factorization.

31320133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418575.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31320133121 its reverse (12133102313), we get a palindrome (43453235434).

The spelling of 31320133121 in words is "thirty-one billion, three hundred twenty million, one hundred thirty-three thousand, one hundred twenty-one".