31320313100121 has 4 divisors (see below), whose sum is σ = 41760417466832. Its totient is φ = 20880208733412.

The previous prime is 31320313100113. The next prime is 31320313100129. The reversal of 31320313100121 is 12100131302313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (31320313100113) and next prime (31320313100129).

It is not a de Polignac number, because 31320313100121 - 2³ = 31320313100113 is a prime.

It is a super-2 number, since 2×31320313100121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320313100129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5220052183351 + ... + 5220052183356.

It is an arithmetic number, because the mean of its divisors is an integer number (10440104366708).

Almost surely, 2^{31320313100121} is an apocalyptic number.

It is an amenable number.

31320313100121 is a deficient number, since it is larger than the sum of its proper divisors (10440104366711).

31320313100121 is a wasteful number, since it uses less digits than its factorization.

31320313100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10440104366710.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31320313100121 its reverse (12100131302313), we get a palindrome (43420444402434).

The spelling of 31320313100121 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirteen million, one hundred thousand, one hundred twenty-one".