31011121332 has 36 divisors (see below), whose sum is σ = 78714511876. Its totient is φ = 10294145280.

The previous prime is 31011121321. The next prime is 31011121369. The reversal of 31011121332 is 23312111013.

31011121332 is a `hidden beast` number, since 310 + 1 + 1 + 1 + 21 + 332 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15434583696 + 15576537636 = 124236^2 + 124806^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1778503 + ... + 1795854.

Almost surely, 2^31011121332 is an apocalyptic number.

It is an amenable number.

31011121332 is an abundant number, since it is smaller than the sum of its proper divisors (47703390544).

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

31011121332 is a wasteful number, since it uses less digits than its factorization.

31011121332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574608 (or 3574603 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31011121332 its reverse (23312111013), we get a palindrome (54323232345).

The spelling of 31011121332 in words is "thirty-one billion, eleven million, one hundred twenty-one thousand, three hundred thirty-two".