122547115621 has 4 divisors (see below), whose sum is σ = 140053846432. Its totient is φ = 105040384812.

The previous prime is 122547115619. The next prime is 122547115631. The reversal of 122547115621 is 126511745221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 126511745221 = 9397 ⋅13462993.

It is a cyclic number.

It is not a de Polignac number, because 122547115621 - 2¹ = 122547115619 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 (122547115601) 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, 8753365395 + ... + 8753365408.

It is an arithmetic number, because the mean of its divisors is an integer number (35013461608).

Almost surely, 2^122547115621 is an apocalyptic number.

It is an amenable number.

122547115621 is a deficient number, since it is larger than the sum of its proper divisors (17506730811).

122547115621 is an equidigital number, since it uses as much as digits as its factorization.

122547115621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17506730810.

The product of its digits is 33600, while the sum is 37.

The spelling of 122547115621 in words is "one hundred twenty-two billion, five hundred forty-seven million, one hundred fifteen thousand, six hundred twenty-one".