20100013231021 has 8 divisors (see below), whose sum is σ = 20145548102144. Its totient is φ = 20054519220240.

The previous prime is 20100013231019. The next prime is 20100013231037. The reversal of 20100013231021 is 12013231000102.

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 20100013231021 - 2¹ = 20100013231019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100013230986 and 20100013231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100013271021) 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, 9230025 + ... + 11197918.

It is an arithmetic number, because the mean of its divisors is an integer number (2518193512768).

Almost surely, 2^{20100013231021} is an apocalyptic number.

It is an amenable number.

20100013231021 is a deficient number, since it is larger than the sum of its proper divisors (45534871123).

20100013231021 is a wasteful number, since it uses less digits than its factorization.

20100013231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430171.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20100013231021 its reverse (12013231000102), we get a palindrome (32113244231123).

The spelling of 20100013231021 in words is "twenty trillion, one hundred billion, thirteen million, two hundred thirty-one thousand, twenty-one".