12051778101 has 32 divisors (see below), whose sum is σ = 17646336000. Its totient is φ = 7255702080.

The previous prime is 12051778099. The next prime is 12051778111. The reversal of 12051778101 is 10187715021.

It is not a de Polignac number, because 12051778101 - 2¹ = 12051778099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051778111) 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, 5823895 + ... + 5825963.

It is an arithmetic number, because the mean of its divisors is an integer number (551448000).

Almost surely, 2^12051778101 is an apocalyptic number.

12051778101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12051778101 is a deficient number, since it is larger than the sum of its proper divisors (5594557899).

12051778101 is a wasteful number, since it uses less digits than its factorization.

12051778101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169.

The product of its (nonzero) digits is 3920, while the sum is 33.

The spelling of 12051778101 in words is "twelve billion, fifty-one million, seven hundred seventy-eight thousand, one hundred one".