331220012117 has 2 divisors, whose sum is σ = 331220012118. Its totient is φ = 331220012116.

The previous prime is 331220012111. The next prime is 331220012129. The reversal of 331220012117 is 711210022133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329339402161 + 1880609956 = 573881^2 + 43366^2 .

It is a cyclic number.

It is not a de Polignac number, because 331220012117 - 2²⁸ = 330951576661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331220012092 and 331220012101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331220012111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165610006058 + 165610006059.

It is an arithmetic number, because the mean of its divisors is an integer number (165610006059).

Almost surely, 2^331220012117 is an apocalyptic number.

It is an amenable number.

331220012117 is a deficient number, since it is larger than the sum of its proper divisors (1).

331220012117 is an equidigital number, since it uses as much as digits as its factorization.

331220012117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The spelling of 331220012117 in words is "three hundred thirty-one billion, two hundred twenty million, twelve thousand, one hundred seventeen".