2101120200021 has 8 divisors (see below), whose sum is σ = 2877209643424. Its totient is φ = 1362888778320.

The previous prime is 2101120200007. The next prime is 2101120200037. The reversal of 2101120200021 is 1200020211012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2101120200021 - 2⁶ = 2101120199957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101120200001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9464505295 + ... + 9464505516.

It is an arithmetic number, because the mean of its divisors is an integer number (359651205428).

Almost surely, 2^{2101120200021} is an apocalyptic number.

It is an amenable number.

2101120200021 is a deficient number, since it is larger than the sum of its proper divisors (776089443403).

2101120200021 is a wasteful number, since it uses less digits than its factorization.

2101120200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18929010851.

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

Adding to 2101120200021 its reverse (1200020211012), we get a palindrome (3301140411033).

The spelling of 2101120200021 in words is "two trillion, one hundred one billion, one hundred twenty million, two hundred thousand, twenty-one".