210112020220021 has 4 divisors (see below), whose sum is σ = 213071344448544. Its totient is φ = 207152695991500.

The previous prime is 210112020220013. The next prime is 210112020220061. The reversal of 210112020220021 is 120022020211012.

It is a happy number.

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 not a de Polignac number, because 210112020220021 - 2³ = 210112020220013 is a prime.

It is a super-2 number, since 2×210112020220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210112020219977 and 210112020220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210112020220061) 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, 1479662114155 + ... + 1479662114296.

It is an arithmetic number, because the mean of its divisors is an integer number (53267836112136).

Almost surely, 2^{210112020220021} is an apocalyptic number.

It is an amenable number.

210112020220021 is a deficient number, since it is larger than the sum of its proper divisors (2959324228523).

210112020220021 is an equidigital number, since it uses as much as digits as its factorization.

210112020220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959324228522.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210112020220021 its reverse (120022020211012), we get a palindrome (330134040431033).

Subtracting from 210112020220021 its reverse (120022020211012), we obtain a palindrome (90090000009009).

The spelling of 210112020220021 in words is "two hundred ten trillion, one hundred twelve billion, twenty million, two hundred twenty thousand, twenty-one".