122077215109 has 2 divisors, whose sum is σ = 122077215110. Its totient is φ = 122077215108.

The previous prime is 122077215061. The next prime is 122077215269. The reversal of 122077215109 is 901512770221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93928764484 + 28148450625 = 306478^2 + 167775^2 .

It is a cyclic number.

It is not a de Polignac number, because 122077215109 - 2⁷ = 122077214981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122077815109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61038607554 + 61038607555.

It is an arithmetic number, because the mean of its divisors is an integer number (61038607555).

Almost surely, 2^122077215109 is an apocalyptic number.

It is an amenable number.

122077215109 is a deficient number, since it is larger than the sum of its proper divisors (1).

122077215109 is an equidigital number, since it uses as much as digits as its factorization.

122077215109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 122077215109 in words is "one hundred twenty-two billion, seventy-seven million, two hundred fifteen thousand, one hundred nine".