197002121 has 4 divisors (see below), whose sum is σ = 200341200. Its totient is φ = 193663044.

The previous prime is 197002111. The next prime is 197002139. The reversal of 197002121 is 121200791.

197002121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 121200791 = 19 ⋅6378989.

It is a cyclic number.

It is not a de Polignac number, because 197002121 - 2¹⁰ = 197001097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197002111) 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, 1669451 + ... + 1669568.

It is an arithmetic number, because the mean of its divisors is an integer number (50085300).

Almost surely, 2^197002121 is an apocalyptic number.

It is an amenable number.

197002121 is a deficient number, since it is larger than the sum of its proper divisors (3339079).

197002121 is an equidigital number, since it uses as much as digits as its factorization.

197002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339078.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 197002121 is about 14035.7444049113. The cubic root of 197002121 is about 581.8668749575.

The spelling of 197002121 in words is "one hundred ninety-seven million, two thousand, one hundred twenty-one".