31121100997 has 8 divisors (see below), whose sum is σ = 35587415552. Its totient is φ = 26659897200.

The previous prime is 31121100991. The next prime is 31121101019. The reversal of 31121100997 is 79900112113.

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

It is a cyclic number.

It is not a de Polignac number, because 31121100997 - 2⁷ = 31121100869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121100991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264629 + ... + 1289002.

It is an arithmetic number, because the mean of its divisors is an integer number (4448426944).

Almost surely, 2^31121100997 is an apocalyptic number.

It is an amenable number.

31121100997 is a deficient number, since it is larger than the sum of its proper divisors (4466314555).

31121100997 is a wasteful number, since it uses less digits than its factorization.

31121100997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555379.

The product of its (nonzero) digits is 3402, while the sum is 34.

The spelling of 31121100997 in words is "thirty-one billion, one hundred twenty-one million, one hundred thousand, nine hundred ninety-seven".