2102102211021 has 4 divisors (see below), whose sum is σ = 2802802948032. Its totient is φ = 1401401474012.

The previous prime is 2102102210959. The next prime is 2102102211059. The reversal of 2102102211021 is 1201122012012.

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 2102102211021 - 2¹⁷ = 2102102079949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102102211821) 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, 350350368501 + ... + 350350368506.

It is an arithmetic number, because the mean of its divisors is an integer number (700700737008).

Almost surely, 2^{2102102211021} is an apocalyptic number.

It is an amenable number.

2102102211021 is a deficient number, since it is larger than the sum of its proper divisors (700700737011).

2102102211021 is an equidigital number, since it uses as much as digits as its factorization.

2102102211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700700737010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2102102211021 its reverse (1201122012012), we get a palindrome (3303224223033).

The spelling of 2102102211021 in words is "two trillion, one hundred two billion, one hundred two million, two hundred eleven thousand, twenty-one".