149197560121 has 9 divisors (see below), whose sum is σ = 152941514349. Its totient is φ = 145543144800.

The previous prime is 149197560053. The next prime is 149197560157. The reversal of 149197560121 is 121065791941.

The square root of 149197560121 is 386261.

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

It can be written as a sum of positive squares in 4 ways, for example, as 68257310121 + 80940250000 = 261261^2 + 284500^2 .

It is not a de Polignac number, because 149197560121 - 2²⁹ = 148660689209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149197560821) 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, 15831991 + ... + 15841411.

Almost surely, 2^149197560121 is an apocalyptic number.

149197560121 is the 386261-st square number.

149197560121 is the 193131-st centered octagonal number.

It is an amenable number.

149197560121 is a deficient number, since it is larger than the sum of its proper divisors (3743954228).

149197560121 is an frugal number, since it uses more digits than its factorization.

149197560121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18924 (or 9462 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 149197560121 in words is "one hundred forty-nine billion, one hundred ninety-seven million, five hundred sixty thousand, one hundred twenty-one".