2120200110021 has 16 divisors (see below), whose sum is σ = 3264088145024. Its totient is φ = 1199052785664.

The previous prime is 2120200110013. The next prime is 2120200110031. The reversal of 2120200110021 is 1200110020212.

It is not a de Polignac number, because 2120200110021 - 2³ = 2120200110013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120200109979 and 2120200110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120200110011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520420180 + ... + 520424253.

It is an arithmetic number, because the mean of its divisors is an integer number (204005509064).

Almost surely, 2^{2120200110021} is an apocalyptic number.

2120200110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2120200110021 is a deficient number, since it is larger than the sum of its proper divisors (1143888035003).

2120200110021 is a wasteful number, since it uses less digits than its factorization.

2120200110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040844540.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2120200110021 its reverse (1200110020212), we get a palindrome (3320310130233).

The spelling of 2120200110021 in words is "two trillion, one hundred twenty billion, two hundred million, one hundred ten thousand, twenty-one".