20221220222351 has 2 divisors, whose sum is σ = 20221220222352. Its totient is φ = 20221220222350.

The previous prime is 20221220222309. The next prime is 20221220222363. The reversal of 20221220222351 is 15322202212202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20221220222351 - 2²² = 20221216028047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20221220222351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20227220222351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110610111175 + 10110610111176.

It is an arithmetic number, because the mean of its divisors is an integer number (10110610111176).

Almost surely, 2^{20221220222351} is an apocalyptic number.

20221220222351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221220222351 is an equidigital number, since it uses as much as digits as its factorization.

20221220222351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20221220222351 its reverse (15322202212202), we get a palindrome (35543422434553).

The spelling of 20221220222351 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, three hundred fifty-one".