31212130331023 has 8 divisors (see below), whose sum is σ = 31562935243200. Its totient is φ = 30861327792768.

The previous prime is 31212130331017. The next prime is 31212130331071. The reversal of 31212130331023 is 32013303121213.

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 31212130331023 - 2¹³ = 31212130322831 is a prime.

It is a super-3 number, since 3×31212130331023³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212130331003) 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, 49089715 + ... + 49721467.

It is an arithmetic number, because the mean of its divisors is an integer number (3945366905400).

Almost surely, 2^{31212130331023} is an apocalyptic number.

31212130331023 is a deficient number, since it is larger than the sum of its proper divisors (350804912177).

31212130331023 is an equidigital number, since it uses as much as digits as its factorization.

31212130331023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186961.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31212130331023 its reverse (32013303121213), we get a palindrome (63225433452236).

The spelling of 31212130331023 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty million, three hundred thirty-one thousand, twenty-three".