121211097 has 16 divisors (see below), whose sum is σ = 191072640. Its totient is φ = 66874752.

The previous prime is 121211063. The next prime is 121211113. The reversal of 121211097 is 790112121.

It is not a de Polignac number, because 121211097 - 2⁶ = 121211033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121211017) 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, 98908 + ... + 100125.

It is an arithmetic number, because the mean of its divisors is an integer number (11942040).

Almost surely, 2^121211097 is an apocalyptic number.

It is an amenable number.

121211097 is a deficient number, since it is larger than the sum of its proper divisors (69861543).

121211097 is a wasteful number, since it uses less digits than its factorization.

121211097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199072.

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 121211097 is about 11009.5911368225. The cubic root of 121211097 is about 494.8962092357.

The spelling of 121211097 in words is "one hundred twenty-one million, two hundred eleven thousand, ninety-seven".