12101821013 has 16 divisors (see below), whose sum is σ = 13181875200. Its totient is φ = 11076320640.

The previous prime is 12101821009. The next prime is 12101821021. The reversal of 12101821013 is 31012810121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12101821013 - 2² = 12101821009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101820013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31898 + ... + 158811.

It is an arithmetic number, because the mean of its divisors is an integer number (823867200).

Almost surely, 2^12101821013 is an apocalyptic number.

It is an amenable number.

12101821013 is a deficient number, since it is larger than the sum of its proper divisors (1080054187).

12101821013 is a wasteful number, since it uses less digits than its factorization.

12101821013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190852.

The product of its (nonzero) digits is 96, while the sum is 20.

The spelling of 12101821013 in words is "twelve billion, one hundred one million, eight hundred twenty-one thousand, thirteen".