20200112101021 has 6 divisors (see below), whose sum is σ = 20506106229630. Its totient is φ = 19898617886136.

The previous prime is 20200112100979. The next prime is 20200112101063. The reversal of 20200112101021 is 12010121100202.

It is an interprime number because it is at equal distance from previous prime (20200112100979) and next prime (20200112101063).

It can be written as a sum of positive squares in only one way, i.e., 19077065352900 + 1123046748121 = 4367730^2 + 1059739^2 .

It is not a de Polignac number, because 20200112101021 - 2¹⁷ = 20200111969949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200112100992 and 20200112101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200112105021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2249952306 + ... + 2249961283.

It is an arithmetic number, because the mean of its divisors is an integer number (3417684371605).

Almost surely, 2^{20200112101021} is an apocalyptic number.

It is an amenable number.

20200112101021 is a deficient number, since it is larger than the sum of its proper divisors (305994128609).

20200112101021 is an frugal number, since it uses more digits than its factorization.

20200112101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499913723 (or 4499913656 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20200112101021 its reverse (12010121100202), we get a palindrome (32210233201223).

The spelling of 20200112101021 in words is "twenty trillion, two hundred billion, one hundred twelve million, one hundred one thousand, twenty-one".