121995610 has 32 divisors (see below), whose sum is σ = 243145152. Its totient is φ = 43697280.

The previous prime is 121995607. The next prime is 121995613. The reversal of 121995610 is 16599121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121995607) and next prime (121995613).

It is not an unprimeable number, because it can be changed into a prime (121995613) 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, 907 + ... + 15646.

It is an arithmetic number, because the mean of its divisors is an integer number (7598286).

Almost surely, 2^121995610 is an apocalyptic number.

121995610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121995610 is a deficient number, since it is larger than the sum of its proper divisors (121149542).

121995610 is a wasteful number, since it uses less digits than its factorization.

121995610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16638.

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 121995610 is about 11045.1622894369. The cubic root of 121995610 is about 495.9616174123.

The spelling of 121995610 in words is "one hundred twenty-one million, nine hundred ninety-five thousand, six hundred ten".