31220313331122 has 48 divisors (see below), whose sum is σ = 67690384594560. Its totient is φ = 10399637736576.

The previous prime is 31220313331117. The next prime is 31220313331133. The reversal of 31220313331122 is 22113331302213.

31220313331122 is a `hidden beast` number, since 3 + 1 + 2 + 2 + 0 + 313 + 331 + 12 + 2 = 666.

It is a super-6 number, since 6×31220313331122⁶ (a number of 82 digits) contains 666666 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720785338 + ... + 720828650.

It is an arithmetic number, because the mean of its divisors is an integer number (1410216345720).

Almost surely, 2^{31220313331122} is an apocalyptic number.

31220313331122 is an abundant number, since it is smaller than the sum of its proper divisors (36470071263438).

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

31220313331122 is a wasteful number, since it uses less digits than its factorization.

31220313331122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69847 (or 69844 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31220313331122 its reverse (22113331302213), we get a palindrome (53333644633335).

The spelling of 31220313331122 in words is "thirty-one trillion, two hundred twenty billion, three hundred thirteen million, three hundred thirty-one thousand, one hundred twenty-two".