121622564537 has 2 divisors, whose sum is σ = 121622564538. Its totient is φ = 121622564536.

The previous prime is 121622564473. The next prime is 121622564587. The reversal of 121622564537 is 735465226121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97511928361 + 24110636176 = 312269^2 + 155276^2 .

It is a cyclic number.

It is not a de Polignac number, because 121622564537 - 2⁶ = 121622564473 is a prime.

It is not a weakly prime, because it can be changed into another prime (121622564587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60811282268 + 60811282269.

It is an arithmetic number, because the mean of its divisors is an integer number (60811282269).

Almost surely, 2^121622564537 is an apocalyptic number.

It is an amenable number.

121622564537 is a deficient number, since it is larger than the sum of its proper divisors (1).

121622564537 is an equidigital number, since it uses as much as digits as its factorization.

121622564537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 44.

The spelling of 121622564537 in words is "one hundred twenty-one billion, six hundred twenty-two million, five hundred sixty-four thousand, five hundred thirty-seven".