31020212223 has 80 divisors (see below), whose sum is σ = 62217340416. Its totient is φ = 14874788160.

The previous prime is 31020212207. The next prime is 31020212233. The reversal of 31020212223 is 32221202013.

It is not a de Polignac number, because 31020212223 - 2⁴ = 31020212207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31020212196 and 31020212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020212233) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 110211 + ... + 272372.

Almost surely, 2^31020212223 is an apocalyptic number.

31020212223 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31020212223 is an abundant number, since it is smaller than the sum of its proper divisors (31197128193).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31020212223 is a wasteful number, since it uses less digits than its factorization.

31020212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382626 (or 382617 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31020212223 its reverse (32221202013), we get a palindrome (63241414236).

The spelling of 31020212223 in words is "thirty-one billion, twenty million, two hundred twelve thousand, two hundred twenty-three".