3121213121231 has 8 divisors (see below), whose sum is σ = 3178762392960. Its totient is φ = 3063818761432.

The previous prime is 3121213121207. The next prime is 3121213121233. The reversal of 3121213121231 is 1321213121213.

It is a happy number.

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 3121213121231 - 2²⁶ = 3121146012367 is a prime.

It is a super-2 number, since 2×3121213121231² (a number of 26 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 = 3121213121197 and 3121213121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121213121233) 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, 38687315 + ... + 38767908.

It is an arithmetic number, because the mean of its divisors is an integer number (397345299120).

Almost surely, 2^{3121213121231} is an apocalyptic number.

3121213121231 is a deficient number, since it is larger than the sum of its proper divisors (57549271729).

3121213121231 is an equidigital number, since it uses as much as digits as its factorization.

3121213121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77455965.

The product of its digits is 432, while the sum is 23.

Adding to 3121213121231 its reverse (1321213121213), we get a palindrome (4442426242444).

The spelling of 3121213121231 in words is "three trillion, one hundred twenty-one billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred thirty-one".