20221210993 has 2 divisors, whose sum is σ = 20221210994. Its totient is φ = 20221210992.

The previous prime is 20221210943. The next prime is 20221211033. The reversal of 20221210993 is 39901212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20173089024 + 48121969 = 142032^2 + 6937^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221210993 - 2¹³ = 20221202801 is a prime.

It is not a weakly prime, because it can be changed into another prime (20221210943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110605496 + 10110605497.

It is an arithmetic number, because the mean of its divisors is an integer number (10110605497).

Almost surely, 2^20221210993 is an apocalyptic number.

It is an amenable number.

20221210993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221210993 is an equidigital number, since it uses as much as digits as its factorization.

20221210993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

It can be divided in two parts, 202212109 and 93, that added together give a palindrome (202212202).

The spelling of 20221210993 in words is "twenty billion, two hundred twenty-one million, two hundred ten thousand, nine hundred ninety-three".