10202202002021 has 4 divisors (see below), whose sum is σ = 10202363082444. Its totient is φ = 10202040921600.

The previous prime is 10202202002017. The next prime is 10202202002051. The reversal of 10202202002021 is 12020020220201.

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 4100264557921 + 6101937444100 = 2024911^2 + 2470210^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202202002021 - 2² = 10202202002017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202202001987 and 10202202002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202202002051) 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, 80445170 + ... + 80571891.

It is an arithmetic number, because the mean of its divisors is an integer number (2550590770611).

Almost surely, 2^{10202202002021} is an apocalyptic number.

It is an amenable number.

10202202002021 is a deficient number, since it is larger than the sum of its proper divisors (161080423).

10202202002021 is an equidigital number, since it uses as much as digits as its factorization.

10202202002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161080422.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 10202202002021 its reverse (12020020220201), we get a palindrome (22222222222222).

The spelling of 10202202002021 in words is "ten trillion, two hundred two billion, two hundred two million, two thousand, twenty-one".