121910 has 16 divisors (see below), whose sum is σ = 223776. Its totient is φ = 47808.

The previous prime is 121909. The next prime is 121921. The reversal of 121910 is 19121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647 + ... + 813.

It is an arithmetic number, because the mean of its divisors is an integer number (13986).

2¹²¹⁹¹⁰ is an apocalyptic number.

121910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121910 is a deficient number, since it is larger than the sum of its proper divisors (101866).

121910 is a wasteful number, since it uses less digits than its factorization.

121910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 121910 is about 349.1561255370. The cubic root of 121910 is about 49.5845577144.

The spelling of 121910 in words is "one hundred twenty-one thousand, nine hundred ten".