117922137766421 has 2 divisors, whose sum is σ = 117922137766422. Its totient is φ = 117922137766420.

The previous prime is 117922137766409. The next prime is 117922137766483. The reversal of 117922137766421 is 124667731229711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96433480203025 + 21488657563396 = 9820055^2 + 4635586^2 .

It is a cyclic number.

It is not a de Polignac number, because 117922137766421 - 2³⁸ = 117647259859477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117922137766721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58961068883210 + 58961068883211.

It is an arithmetic number, because the mean of its divisors is an integer number (58961068883211).

Almost surely, 2^{117922137766421} is an apocalyptic number.

It is an amenable number.

117922137766421 is a deficient number, since it is larger than the sum of its proper divisors (1).

117922137766421 is an equidigital number, since it uses as much as digits as its factorization.

117922137766421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 59.

The spelling of 117922137766421 in words is "one hundred seventeen trillion, nine hundred twenty-two billion, one hundred thirty-seven million, seven hundred sixty-six thousand, four hundred twenty-one".