122397821316 has 27 divisors (see below), whose sum is σ = 309399798981. Its totient is φ = 40798574064.

The previous prime is 122397821311. The next prime is 122397821333. The reversal of 122397821316 is 613128793221.

It is a happy number.

The square root of 122397821316 is 349854.

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

122397821316 is a `hidden beast` number, since 1 + 223 + 97 + 8 + 21 + 316 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58348334916 + 64049486400 = 241554^2 + 253080^2 .

It is not an unprimeable number, because it can be changed into a prime (122397821311) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2069970 + ... + 2128278.

Almost surely, 2^122397821316 is an apocalyptic number.

122397821316 is the 349854-th square number.

It is an amenable number.

122397821316 is an abundant number, since it is smaller than the sum of its proper divisors (187001977665).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122397821316 is an frugal number, since it uses more digits than its factorization.

122397821316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116628 (or 58314 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 122397821316 in words is "one hundred twenty-two billion, three hundred ninety-seven million, eight hundred twenty-one thousand, three hundred sixteen".