122187565901 has 2 divisors, whose sum is σ = 122187565902. Its totient is φ = 122187565900.

The previous prime is 122187565793. The next prime is 122187565957. The reversal of 122187565901 is 109565781221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122184503401 + 3062500 = 349549^2 + 1750^2 .

It is a cyclic number.

It is not a de Polignac number, because 122187565901 - 2²⁶ = 122120457037 is a prime.

It is a super-2 number, since 2×122187565901² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122187565961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61093782950 + 61093782951.

It is an arithmetic number, because the mean of its divisors is an integer number (61093782951).

Almost surely, 2^122187565901 is an apocalyptic number.

It is an amenable number.

122187565901 is a deficient number, since it is larger than the sum of its proper divisors (1).

122187565901 is an equidigital number, since it uses as much as digits as its factorization.

122187565901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 122187565901 in words is "one hundred twenty-two billion, one hundred eighty-seven million, five hundred sixty-five thousand, nine hundred one".