2102202211021 has 4 divisors (see below), whose sum is σ = 2293311502944. Its totient is φ = 1911092919100.

The previous prime is 2102202211003. The next prime is 2102202211061. The reversal of 2102202211021 is 1201122022012.

It is a happy number.

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 2102202211021 - 2⁷ = 2102202210893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102202210986 and 2102202211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102202211061) 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, 95554645945 + ... + 95554645966.

It is an arithmetic number, because the mean of its divisors is an integer number (573327875736).

Almost surely, 2^{2102202211021} is an apocalyptic number.

It is an amenable number.

2102202211021 is a deficient number, since it is larger than the sum of its proper divisors (191109291923).

2102202211021 is a wasteful number, since it uses less digits than its factorization.

2102202211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191109291922.

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

Adding to 2102202211021 its reverse (1201122022012), we get a palindrome (3303324233033).

The spelling of 2102202211021 in words is "two trillion, one hundred two billion, two hundred two million, two hundred eleven thousand, twenty-one".