31212023131021 has 8 divisors (see below), whose sum is σ = 31938169396320. Its totient is φ = 30485889832272.

The previous prime is 31212023131019. The next prime is 31212023131043. The reversal of 31212023131021 is 12013132021213.

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 31212023131021 - 2¹ = 31212023131019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212023130983 and 31212023131001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212023137021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1715775 + ... + 8085043.

It is an arithmetic number, because the mean of its divisors is an integer number (3992271174540).

Almost surely, 2^{31212023131021} is an apocalyptic number.

It is an amenable number.

31212023131021 is a deficient number, since it is larger than the sum of its proper divisors (726146265299).

31212023131021 is a wasteful number, since it uses less digits than its factorization.

31212023131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483275.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31212023131021 its reverse (12013132021213), we get a palindrome (43225155152234).

The spelling of 31212023131021 in words is "thirty-one trillion, two hundred twelve billion, twenty-three million, one hundred thirty-one thousand, twenty-one".