2202000020021 has 4 divisors (see below), whose sum is σ = 2204908871532. Its totient is φ = 2199091168512.

The previous prime is 2202000019993. The next prime is 2202000020029. The reversal of 2202000020021 is 1200200002022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1843810936900 + 358189083121 = 1357870^2 + 598489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202000020021 - 2⁶ = 2202000019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202000019984 and 2202000020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202000020029) 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, 1454424620 + ... + 1454426133.

It is an arithmetic number, because the mean of its divisors is an integer number (551227217883).

Almost surely, 2^{2202000020021} is an apocalyptic number.

It is an amenable number.

2202000020021 is a deficient number, since it is larger than the sum of its proper divisors (2908851511).

2202000020021 is an equidigital number, since it uses as much as digits as its factorization.

2202000020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908851510.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 2202000020021 its reverse (1200200002022), we get a palindrome (3402200022043).

The spelling of 2202000020021 in words is "two trillion, two hundred two billion, twenty thousand, twenty-one".