20221012397 has 2 divisors, whose sum is σ = 20221012398. Its totient is φ = 20221012396.

The previous prime is 20221012367. The next prime is 20221012451. The reversal of 20221012397 is 79321012202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18131699716 + 2089312681 = 134654^2 + 45709^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221012397 - 2¹⁰ = 20221011373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221012307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110506198 + 10110506199.

It is an arithmetic number, because the mean of its divisors is an integer number (10110506199).

Almost surely, 2^20221012397 is an apocalyptic number.

It is an amenable number.

20221012397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221012397 is an equidigital number, since it uses as much as digits as its factorization.

20221012397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 20221012397 its reverse (79321012202), we get a palindrome (99542024599).

The spelling of 20221012397 in words is "twenty billion, two hundred twenty-one million, twelve thousand, three hundred ninety-seven".