2101222201021 has 8 divisors (see below), whose sum is σ = 2211840413600. Its totient is φ = 1990606745520.

The previous prime is 2101222201019. The next prime is 2101222201033. The reversal of 2101222201021 is 1201022221012.

It is a happy number.

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

It is not a de Polignac number, because 2101222201021 - 2¹ = 2101222201019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101222200986 and 2101222201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101222201081) 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, 978595 + ... + 2271583.

It is an arithmetic number, because the mean of its divisors is an integer number (276480051700).

Almost surely, 2^{2101222201021} is an apocalyptic number.

It is an amenable number.

2101222201021 is a deficient number, since it is larger than the sum of its proper divisors (110618212579).

2101222201021 is a wasteful number, since it uses less digits than its factorization.

2101222201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378539.

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

Adding to 2101222201021 its reverse (1201022221012), we get a palindrome (3302244422033).

The spelling of 2101222201021 in words is "two trillion, one hundred one billion, two hundred twenty-two million, two hundred one thousand, twenty-one".