2202121021021 has 4 divisors (see below), whose sum is σ = 2213186956000. Its totient is φ = 2191055086044.

The previous prime is 2202121021013. The next prime is 2202121021057. The reversal of 2202121021021 is 1201201212022.

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 2202121021021 - 2³ = 2202121021013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202121020986 and 2202121021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202121021081) 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, 5532967191 + ... + 5532967588.

It is an arithmetic number, because the mean of its divisors is an integer number (553296739000).

Almost surely, 2^{2202121021021} is an apocalyptic number.

It is an amenable number.

2202121021021 is a deficient number, since it is larger than the sum of its proper divisors (11065934979).

2202121021021 is a wasteful number, since it uses less digits than its factorization.

2202121021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11065934978.

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

Adding to 2202121021021 its reverse (1201201212022), we get a palindrome (3403322233043).

The spelling of 2202121021021 in words is "two trillion, two hundred two billion, one hundred twenty-one million, twenty-one thousand, twenty-one".