202202201021 has 2 divisors, whose sum is σ = 202202201022. Its totient is φ = 202202201020.

The previous prime is 202202201009. The next prime is 202202201029. The reversal of 202202201021 is 120102202202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131613681796 + 70588519225 = 362786^2 + 265685^2 .

It is a cyclic number.

It is not a de Polignac number, because 202202201021 - 2²⁶ = 202135092157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202202200987 and 202202201005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202202201029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101101100510 + 101101100511.

It is an arithmetic number, because the mean of its divisors is an integer number (101101100511).

Almost surely, 2^202202201021 is an apocalyptic number.

It is an amenable number.

202202201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202202201021 is an equidigital number, since it uses as much as digits as its factorization.

202202201021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 202202201021 its reverse (120102202202), we get a palindrome (322304403223).

The spelling of 202202201021 in words is "two hundred two billion, two hundred two million, two hundred one thousand, twenty-one".