31213013203303 has 4 divisors (see below), whose sum is σ = 31213035575368. Its totient is φ = 31212990831240.

The previous prime is 31213013203301. The next prime is 31213013203321. The reversal of 31213013203303 is 30330231031213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31213013203303 - 2¹ = 31213013203301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213013203301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8943393 + ... + 11933578.

It is an arithmetic number, because the mean of its divisors is an integer number (7803258893842).

Almost surely, 2^{31213013203303} is an apocalyptic number.

31213013203303 is a deficient number, since it is larger than the sum of its proper divisors (22372065).

31213013203303 is a wasteful number, since it uses less digits than its factorization.

31213013203303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22372064.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 31213013203303 its reverse (30330231031213), we get a palindrome (61543244234516).

The spelling of 31213013203303 in words is "thirty-one trillion, two hundred thirteen billion, thirteen million, two hundred three thousand, three hundred three".