122491600157 has 2 divisors, whose sum is σ = 122491600158. Its totient is φ = 122491600156.

The previous prime is 122491600117. The next prime is 122491600163. The reversal of 122491600157 is 751006194221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115973621401 + 6517978756 = 340549^2 + 80734^2 .

It is a cyclic number.

It is not a de Polignac number, because 122491600157 - 2¹⁶ = 122491534621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122491600157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122491600117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61245800078 + 61245800079.

It is an arithmetic number, because the mean of its divisors is an integer number (61245800079).

Almost surely, 2^122491600157 is an apocalyptic number.

It is an amenable number.

122491600157 is a deficient number, since it is larger than the sum of its proper divisors (1).

122491600157 is an equidigital number, since it uses as much as digits as its factorization.

122491600157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

Adding to 122491600157 its reverse (751006194221), we get a palindrome (873497794378).

The spelling of 122491600157 in words is "one hundred twenty-two billion, four hundred ninety-one million, six hundred thousand, one hundred fifty-seven".