31212223013 has 8 divisors (see below), whose sum is σ = 31625039040. Its totient is φ = 30802096800.

The previous prime is 31212222991. The next prime is 31212223051. The reversal of 31212223013 is 31032221213.

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 31212223013 - 2⁶ = 31212222949 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 (31212223093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649088 + ... + 695513.

It is an arithmetic number, because the mean of its divisors is an integer number (3953129880).

Almost surely, 2^31212223013 is an apocalyptic number.

It is an amenable number.

31212223013 is a deficient number, since it is larger than the sum of its proper divisors (412816027).

31212223013 is a wasteful number, since it uses less digits than its factorization.

31212223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344907.

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

Adding to 31212223013 its reverse (31032221213), we get a palindrome (62244444226).

The spelling of 31212223013 in words is "thirty-one billion, two hundred twelve million, two hundred twenty-three thousand, thirteen".