31131103331122 has 8 divisors (see below), whose sum is σ = 46698803318556. Its totient is φ = 15564835558272.

The previous prime is 31131103331071. The next prime is 31131103331131. The reversal of 31131103331122 is 22113330113113.

It can be written as a sum of positive squares in 2 ways, for example, as 21796862401521 + 9334240929601 = 4668711^2 + 3055199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31131103331122² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357999303 + ... + 358086250.

Almost surely, 2^{31131103331122} is an apocalyptic number.

31131103331122 is a deficient number, since it is larger than the sum of its proper divisors (15567699987434).

31131103331122 is a wasteful number, since it uses less digits than its factorization.

31131103331122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716107292.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31131103331122 its reverse (22113330113113), we get a palindrome (53244433444235).

The spelling of 31131103331122 in words is "thirty-one trillion, one hundred thirty-one billion, one hundred three million, three hundred thirty-one thousand, one hundred twenty-two".