121097100 has 72 divisors (see below), whose sum is σ = 353866240. Its totient is φ = 31970880.

The previous prime is 121097099. The next prime is 121097111. The reversal of 121097100 is 1790121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28941 + ... + 32859.

Almost surely, 2^121097100 is an apocalyptic number.

121097100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121097100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176933120).

121097100 is an abundant number, since it is smaller than the sum of its proper divisors (232769140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121097100 is a wasteful number, since it uses less digits than its factorization.

121097100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039 (or 4032 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 121097100 is about 11004.4127512557. The cubic root of 121097100 is about 494.7410133828.

The spelling of 121097100 in words is "one hundred twenty-one million, ninety-seven thousand, one hundred".