31203123201213 has 4 divisors (see below), whose sum is σ = 41604164268288. Its totient is φ = 20802082134140.

The previous prime is 31203123201193. The next prime is 31203123201221. The reversal of 31203123201213 is 31210232130213.

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 a cyclic number.

It is not a de Polignac number, because 31203123201213 - 2⁸ = 31203123200957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203123201233) 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, 5200520533533 + ... + 5200520533538.

It is an arithmetic number, because the mean of its divisors is an integer number (10401041067072).

Almost surely, 2^{31203123201213} is an apocalyptic number.

It is an amenable number.

31203123201213 is a deficient number, since it is larger than the sum of its proper divisors (10401041067075).

31203123201213 is a wasteful number, since it uses less digits than its factorization.

31203123201213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10401041067074.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31203123201213 its reverse (31210232130213), we get a palindrome (62413355331426).

The spelling of 31203123201213 in words is "thirty-one trillion, two hundred three billion, one hundred twenty-three million, two hundred one thousand, two hundred thirteen".