31011322212 has 54 divisors (see below), whose sum is σ = 84883571682. Its totient is φ = 9541943424.

The previous prime is 31011322193. The next prime is 31011322213. The reversal of 31011322212 is 21222311013.

31011322212 is a `hidden beast` number, since 310 + 1 + 132 + 221 + 2 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2785306176 + 28226016036 = 52776^2 + 168006^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31011322213) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2542513 + ... + 2554680.

Almost surely, 2^31011322212 is an apocalyptic number.

It is an amenable number.

31011322212 is an abundant number, since it is smaller than the sum of its proper divisors (53872249470).

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

31011322212 is a wasteful number, since it uses less digits than its factorization.

31011322212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097229 (or 5097211 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31011322212 its reverse (21222311013), we get a palindrome (52233633225).

The spelling of 31011322212 in words is "thirty-one billion, eleven million, three hundred twenty-two thousand, two hundred twelve".