20202221011237 has 2 divisors, whose sum is σ = 20202221011238. Its totient is φ = 20202221011236.

The previous prime is 20202221011207. The next prime is 20202221011241. The reversal of 20202221011237 is 73211012220202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12147971335236 + 8054249676001 = 3485394^2 + 2838001^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202221011237 - 2¹⁵ = 20202220978469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202221011207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101110505618 + 10101110505619.

It is an arithmetic number, because the mean of its divisors is an integer number (10101110505619).

Almost surely, 2^{20202221011237} is an apocalyptic number.

It is an amenable number.

20202221011237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202221011237 is an equidigital number, since it uses as much as digits as its factorization.

20202221011237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 20202221011237 its reverse (73211012220202), we get a palindrome (93413233231439).

The spelling of 20202221011237 in words is "twenty trillion, two hundred two billion, two hundred twenty-one million, eleven thousand, two hundred thirty-seven".