122612505551 has 4 divisors (see below), whose sum is σ = 122625069072. Its totient is φ = 122599942032.

The previous prime is 122612505539. The next prime is 122612505563. The reversal of 122612505551 is 155505216221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155505216221 = 181 ⋅859144841.

It is an interprime number because it is at equal distance from previous prime (122612505539) and next prime (122612505563).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122612505551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122612504551) 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, 6267110 + ... + 6286643.

It is an arithmetic number, because the mean of its divisors is an integer number (30656267268).

Almost surely, 2^122612505551 is an apocalyptic number.

122612505551 is a deficient number, since it is larger than the sum of its proper divisors (12563521).

122612505551 is an equidigital number, since it uses as much as digits as its factorization.

122612505551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563520.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 122612505551 in words is "one hundred twenty-two billion, six hundred twelve million, five hundred five thousand, five hundred fifty-one".