121121197 has 16 divisors (see below), whose sum is σ = 131984640. Its totient is φ = 110801152.

The previous prime is 121121191. The next prime is 121121201. The reversal of 121121197 is 791121121.

It is a cyclic number.

It is not a de Polignac number, because 121121197 - 2¹⁹ = 120596909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74568 + ... + 76174.

It is an arithmetic number, because the mean of its divisors is an integer number (8249040).

Almost surely, 2^121121197 is an apocalyptic number.

It is an amenable number.

121121197 is a deficient number, since it is larger than the sum of its proper divisors (10863443).

121121197 is a wasteful number, since it uses less digits than its factorization.

121121197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772.

The product of its digits is 252, while the sum is 25.

The square root of 121121197 is about 11005.5075757550. The cubic root of 121121197 is about 494.7738272254.

The spelling of 121121197 in words is "one hundred twenty-one million, one hundred twenty-one thousand, one hundred ninety-seven".