12010655551 has 4 divisors (see below), whose sum is σ = 12011057704. Its totient is φ = 12010253400.

The previous prime is 12010655543. The next prime is 12010655563. The reversal of 12010655551 is 15555601021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12010655551 - 2³ = 12010655543 is a prime.

It is a super-2 number, since 2×12010655551² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010655521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152340 + ... + 217321.

It is an arithmetic number, because the mean of its divisors is an integer number (3002764426).

Almost surely, 2^12010655551 is an apocalyptic number.

12010655551 is a deficient number, since it is larger than the sum of its proper divisors (402153).

12010655551 is an equidigital number, since it uses as much as digits as its factorization.

12010655551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402152.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 12010655551 in words is "twelve billion, ten million, six hundred fifty-five thousand, five hundred fifty-one".