12101955 has 16 divisors (see below), whose sum is σ = 20382720. Its totient is φ = 6114528.

The previous prime is 12101927. The next prime is 12102001. The reversal of 12101955 is 55910121.

It is not a de Polignac number, because 12101955 - 2⁶ = 12101891 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20947 + ... + 21516.

It is an arithmetic number, because the mean of its divisors is an integer number (1273920).

Almost surely, 2^12101955 is an apocalyptic number.

12101955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12101955 is a deficient number, since it is larger than the sum of its proper divisors (8280765).

12101955 is a wasteful number, since it uses less digits than its factorization.

12101955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42490.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 12101955 is about 3478.7864263274. The cubic root of 12101955 is about 229.5894060739.

The spelling of 12101955 in words is "twelve million, one hundred one thousand, nine hundred fifty-five".