122651345261 has 2 divisors, whose sum is σ = 122651345262. Its totient is φ = 122651345260.

The previous prime is 122651345249. The next prime is 122651345263. The reversal of 122651345261 is 162543156221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90258184900 + 32393160361 = 300430^2 + 179981^2 .

It is a cyclic number.

It is not a de Polignac number, because 122651345261 - 2⁶ = 122651345197 is a prime.

Together with 122651345263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122651345263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61325672630 + 61325672631.

It is an arithmetic number, because the mean of its divisors is an integer number (61325672631).

Almost surely, 2^122651345261 is an apocalyptic number.

It is an amenable number.

122651345261 is a deficient number, since it is larger than the sum of its proper divisors (1).

122651345261 is an equidigital number, since it uses as much as digits as its factorization.

122651345261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The spelling of 122651345261 in words is "one hundred twenty-two billion, six hundred fifty-one million, three hundred forty-five thousand, two hundred sixty-one".