12101551 has 8 divisors (see below), whose sum is σ = 15087744. Its totient is φ = 9429720.

The previous prime is 12101527. The next prime is 12101567. The reversal of 12101551 is 15510121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12101551 - 2²¹ = 10004399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101591) 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, 78505 + ... + 78658.

It is an arithmetic number, because the mean of its divisors is an integer number (1885968).

Almost surely, 2^12101551 is an apocalyptic number.

12101551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12101551 is a deficient number, since it is larger than the sum of its proper divisors (2986193).

12101551 is a wasteful number, since it uses less digits than its factorization.

12101551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157181.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 12101551 is about 3478.7283596165. The cubic root of 12101551 is about 229.5868512484.

Adding to 12101551 its reverse (15510121), we get a palindrome (27611672).

The spelling of 12101551 in words is "twelve million, one hundred one thousand, five hundred fifty-one".