2110202220021 has 24 divisors (see below), whose sum is σ = 3361425276960. Its totient is φ = 1173239841312.

The previous prime is 2110202220013. The next prime is 2110202220073. The reversal of 2110202220021 is 1200222020112.

It is not a de Polignac number, because 2110202220021 - 2³ = 2110202220013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110202230021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193982631 + ... + 193993508.

It is an arithmetic number, because the mean of its divisors is an integer number (140059386540).

Almost surely, 2^{2110202220021} is an apocalyptic number.

2110202220021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2110202220021 is a deficient number, since it is larger than the sum of its proper divisors (1251223056939).

2110202220021 is a wasteful number, since it uses less digits than its factorization.

2110202220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387976193 (or 387976186 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2110202220021 its reverse (1200222020112), we get a palindrome (3310424240133).

The spelling of 2110202220021 in words is "two trillion, one hundred ten billion, two hundred two million, two hundred twenty thousand, twenty-one".