122821510681 has 3 divisors (see below), whose sum is σ = 122821861141. Its totient is φ = 122821160222.

The previous prime is 122821510639. The next prime is 122821510687. The reversal of 122821510681 is 186015128221.

The square root of 122821510681 is 350459.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 122821510681 - 2¹⁵ = 122821477913 is a prime.

It is a super-2 number, since 2×122821510681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122821510681.

It is not an unprimeable number, because it can be changed into a prime (122821510687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 175230 + ... + 525688.

Almost surely, 2^122821510681 is an apocalyptic number.

122821510681 is the 350459-th square number.

122821510681 is the 175230-th centered octagonal number.

It is an amenable number.

122821510681 is a deficient number, since it is larger than the sum of its proper divisors (350460).

122821510681 is an frugal number, since it uses more digits than its factorization.

122821510681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700918 (or 350459 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

The spelling of 122821510681 in words is "one hundred twenty-two billion, eight hundred twenty-one million, five hundred ten thousand, six hundred eighty-one".