20112202110021 has 64 divisors (see below), whose sum is σ = 32830444339200. Its totient is φ = 10696900870656.

The previous prime is 20112202109999. The next prime is 20112202110043. The reversal of 20112202110021 is 12001120221102.

It is an interprime number because it is at equal distance from previous prime (20112202109999) and next prime (20112202110043).

It is not a de Polignac number, because 20112202110021 - 2¹⁰ = 20112202108997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112202110821) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3771516 + ... + 7378938.

It is an arithmetic number, because the mean of its divisors is an integer number (512975692800).

Almost surely, 2^{20112202110021} is an apocalyptic number.

20112202110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20112202110021 is a deficient number, since it is larger than the sum of its proper divisors (12718242229179).

20112202110021 is a wasteful number, since it uses less digits than its factorization.

20112202110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607698.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20112202110021 its reverse (12001120221102), we get a palindrome (32113322331123).

The spelling of 20112202110021 in words is "twenty trillion, one hundred twelve billion, two hundred two million, one hundred ten thousand, twenty-one".