31212132023 has 4 divisors (see below), whose sum is σ = 31214082120. Its totient is φ = 31210181928.

The previous prime is 31212132019. The next prime is 31212132031. The reversal of 31212132023 is 32023121213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32023121213 = 139 ⋅230382167.

It is a cyclic number.

It is not a de Polignac number, because 31212132023 - 2² = 31212132019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212131986 and 31212132004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212132323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950840 + ... + 983117.

It is an arithmetic number, because the mean of its divisors is an integer number (7803520530).

Almost surely, 2^31212132023 is an apocalyptic number.

31212132023 is a deficient number, since it is larger than the sum of its proper divisors (1950097).

31212132023 is a wasteful number, since it uses less digits than its factorization.

31212132023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950096.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31212132023 its reverse (32023121213), we get a palindrome (63235253236).

The spelling of 31212132023 in words is "thirty-one billion, two hundred twelve million, one hundred thirty-two thousand, twenty-three".