12101856 has 48 divisors (see below), whose sum is σ = 34214544. Its totient is φ = 3723264.

The previous prime is 12101839. The next prime is 12101857. The reversal of 12101856 is 65810121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3601 + ... + 6096.

It is an arithmetic number, because the mean of its divisors is an integer number (712803).

Almost surely, 2^12101856 is an apocalyptic number.

12101856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12101856 is an abundant number, since it is smaller than the sum of its proper divisors (22112688).

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

12101856 is a wasteful number, since it uses less digits than its factorization.

12101856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723 (or 9715 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 12101856 is about 3478.7721971983. The cubic root of 12101856 is about 229.5887800205.

Adding to 12101856 its reverse (65810121), we get a palindrome (77911977).

The spelling of 12101856 in words is "twelve million, one hundred one thousand, eight hundred fifty-six".