31202020103213 has 32 divisors (see below), whose sum is σ = 33383297525760. Its totient is φ = 29098217998080.

The previous prime is 31202020103207. The next prime is 31202020103249. The reversal of 31202020103213 is 31230102020213.

It is not a de Polignac number, because 31202020103213 - 2¹⁶ = 31202020037677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202020103713) 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 31 ways as a sum of consecutive naturals, for example, 1289487431 + ... + 1289511627.

It is an arithmetic number, because the mean of its divisors is an integer number (1043228047680).

Almost surely, 2^{31202020103213} is an apocalyptic number.

It is an amenable number.

31202020103213 is a deficient number, since it is larger than the sum of its proper divisors (2181277422547).

31202020103213 is a wasteful number, since it uses less digits than its factorization.

31202020103213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26957.

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

Adding to 31202020103213 its reverse (31230102020213), we get a palindrome (62432122123426).

The spelling of 31202020103213 in words is "thirty-one trillion, two hundred two billion, twenty million, one hundred three thousand, two hundred thirteen".