12205541511 has 32 divisors (see below), whose sum is σ = 18401859840. Its totient is φ = 7994311200.

The previous prime is 12205541501. The next prime is 12205541519. The reversal of 12205541511 is 11514550221.

It is a happy number.

It is not a de Polignac number, because 12205541511 - 2²⁷ = 12071323783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205541519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390576 + ... + 420666.

It is an arithmetic number, because the mean of its divisors is an integer number (575058120).

Almost surely, 2^12205541511 is an apocalyptic number.

12205541511 is a deficient number, since it is larger than the sum of its proper divisors (6196318329).

12205541511 is a wasteful number, since it uses less digits than its factorization.

12205541511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30364 (or 30358 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 12205541511 in words is "twelve billion, two hundred five million, five hundred forty-one thousand, five hundred eleven".