31666881122 has 18 divisors (see below), whose sum is σ = 49206084993. Its totient is φ = 15283936584.

The previous prime is 31666881109. The next prime is 31666881143. The reversal of 31666881122 is 22118866613.

It can be written as a sum of positive squares in 2 ways, for example, as 31648054201 + 18826921 = 177899^2 + 4339^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=125831.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7296029 + ... + 7300367.

Almost surely, 2^31666881122 is an apocalyptic number.

31666881122 is a deficient number, since it is larger than the sum of its proper divisors (17539203871).

31666881122 is an frugal number, since it uses more digits than its factorization.

31666881122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738 (or 4370 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The spelling of 31666881122 in words is "thirty-one billion, six hundred sixty-six million, eight hundred eighty-one thousand, one hundred twenty-two".