18601101101021 has 4 divisors (see below), whose sum is σ = 18863088440544. Its totient is φ = 18339113761500.

The previous prime is 18601101100999. The next prime is 18601101101111. The reversal of 18601101101021 is 12010110110681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18601101101021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18601101101621) 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, 130993669655 + ... + 130993669796.

It is an arithmetic number, because the mean of its divisors is an integer number (4715772110136).

Almost surely, 2^{18601101101021} is an apocalyptic number.

It is an amenable number.

18601101101021 is a deficient number, since it is larger than the sum of its proper divisors (261987339523).

18601101101021 is an equidigital number, since it uses as much as digits as its factorization.

18601101101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261987339522.

The product of its (nonzero) digits is 96, while the sum is 23.

The spelling of 18601101101021 in words is "eighteen trillion, six hundred one billion, one hundred one million, one hundred one thousand, twenty-one".