18101022013021 has 8 divisors (see below), whose sum is σ = 18623482025400. Its totient is φ = 17582417794560.

The previous prime is 18101022013003. The next prime is 18101022013043. The reversal of 18101022013021 is 12031022010181.

It can be written as a sum of positive squares in 4 ways, for example, as 3239118060025 + 14861903952996 = 1799755^2 + 3855114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18101022013021 - 2⁹ = 18101022012509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18101022012983 and 18101022013001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18101022013051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963938956 + ... + 963957733.

It is an arithmetic number, because the mean of its divisors is an integer number (2327935253175).

Almost surely, 2^{18101022013021} is an apocalyptic number.

It is an amenable number.

18101022013021 is a deficient number, since it is larger than the sum of its proper divisors (522460012379).

18101022013021 is a wasteful number, since it uses less digits than its factorization.

18101022013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927896959.

The product of its (nonzero) digits is 192, while the sum is 22.

The spelling of 18101022013021 in words is "eighteen trillion, one hundred one billion, twenty-two million, thirteen thousand, twenty-one".