20202202111021 has 4 divisors (see below), whose sum is σ = 23088230984032. Its totient is φ = 17316173238012.

The previous prime is 20202202110991. The next prime is 20202202111031. The reversal of 20202202111021 is 12011120220202.

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 20202202111021 - 2⁹ = 20202202110509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202202110986 and 20202202111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202202111031) 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, 1443014436495 + ... + 1443014436508.

It is an arithmetic number, because the mean of its divisors is an integer number (5772057746008).

Almost surely, 2^{20202202111021} is an apocalyptic number.

It is an amenable number.

20202202111021 is a deficient number, since it is larger than the sum of its proper divisors (2886028873011).

20202202111021 is an equidigital number, since it uses as much as digits as its factorization.

20202202111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886028873010.

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

Adding to 20202202111021 its reverse (12011120220202), we get a palindrome (32213322331223).

The spelling of 20202202111021 in words is "twenty trillion, two hundred two billion, two hundred two million, one hundred eleven thousand, twenty-one".