122615377109 has 2 divisors, whose sum is σ = 122615377110. Its totient is φ = 122615377108.

The previous prime is 122615377103. The next prime is 122615377111. The reversal of 122615377109 is 901773516221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65048972209 + 57566404900 = 255047^2 + 239930^2 .

It is a cyclic number.

It is not a de Polignac number, because 122615377109 - 2¹⁶ = 122615311573 is a prime.

Together with 122615377111, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122615377109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122615377103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61307688554 + 61307688555.

It is an arithmetic number, because the mean of its divisors is an integer number (61307688555).

Almost surely, 2^122615377109 is an apocalyptic number.

It is an amenable number.

122615377109 is a deficient number, since it is larger than the sum of its proper divisors (1).

122615377109 is an equidigital number, since it uses as much as digits as its factorization.

122615377109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 122615377109 in words is "one hundred twenty-two billion, six hundred fifteen million, three hundred seventy-seven thousand, one hundred nine".