122656314551 has 4 divisors (see below), whose sum is σ = 124336538112. Its totient is φ = 120976090992.

The previous prime is 122656314541. The next prime is 122656314569. The reversal of 122656314551 is 155413656221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155413656221 = 41 ⋅3790576981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122656314551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122656314499 and 122656314508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122656314541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840111671 + ... + 840111816.

It is an arithmetic number, because the mean of its divisors is an integer number (31084134528).

Almost surely, 2^122656314551 is an apocalyptic number.

122656314551 is a deficient number, since it is larger than the sum of its proper divisors (1680223561).

122656314551 is an equidigital number, since it uses as much as digits as its factorization.

122656314551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680223560.

The product of its digits is 216000, while the sum is 41.

The spelling of 122656314551 in words is "one hundred twenty-two billion, six hundred fifty-six million, three hundred fourteen thousand, five hundred fifty-one".