122556661031 has 4 divisors (see below), whose sum is σ = 140064755472. Its totient is φ = 105048566592.

The previous prime is 122556661013. The next prime is 122556661057. The reversal of 122556661031 is 130166655221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130166655221 = 7321 ⋅17779901.

It is a cyclic number.

It is not a de Polignac number, because 122556661031 - 2¹⁰ = 122556660007 is a prime.

It is a super-2 number, since 2×122556661031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122556661081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8754047210 + ... + 8754047223.

It is an arithmetic number, because the mean of its divisors is an integer number (35016188868).

Almost surely, 2^122556661031 is an apocalyptic number.

122556661031 is a deficient number, since it is larger than the sum of its proper divisors (17508094441).

122556661031 is an equidigital number, since it uses as much as digits as its factorization.

122556661031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17508094440.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 122556661031 in words is "one hundred twenty-two billion, five hundred fifty-six million, six hundred sixty-one thousand, thirty-one".