31223301012 has 60 divisors (see below), whose sum is σ = 81753768096. Its totient is φ = 10391204880.

The previous prime is 31223301001. The next prime is 31223301017. The reversal of 31223301012 is 21010332213.

31223301012 is a `hidden beast` number, since 312 + 2 + 330 + 10 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223301017) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 128083 + ... + 280805.

Almost surely, 2^31223301012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31223301012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40876884048).

31223301012 is an abundant number, since it is smaller than the sum of its proper divisors (50530467084).

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

31223301012 is a wasteful number, since it uses less digits than its factorization.

31223301012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153370 (or 153359 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31223301012 its reverse (21010332213), we get a palindrome (52233633225).

The spelling of 31223301012 in words is "thirty-one billion, two hundred twenty-three million, three hundred one thousand, twelve".