197367836121 has 81 divisors (see below), whose sum is σ = 314045001309. Its totient is φ = 119417356800.

The previous prime is 197367836063. The next prime is 197367836153. The reversal of 197367836121 is 121638763791.

The square root of 197367836121 is 444261.

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

197367836121 is a `hidden beast` number, since 19 + 7 + 3 + 6 + 7 + 8 + 3 + 612 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 41292272025 + 156075564096 = 203205^2 + 395064^2 .

It is not a de Polignac number, because 197367836121 - 2¹¹ = 197367834073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197367836221) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 702376501 + ... + 702376781.

Almost surely, 2^197367836121 is an apocalyptic number.

197367836121 is the 444261-st square number.

197367836121 is the 222131-st centered octagonal number.

It is an amenable number.

197367836121 is a deficient number, since it is larger than the sum of its proper divisors (116677165188).

197367836121 is an equidigital number, since it uses as much as digits as its factorization.

197367836121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 332 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 197367836121 in words is "one hundred ninety-seven billion, three hundred sixty-seven million, eight hundred thirty-six thousand, one hundred twenty-one".