20220223203421 has 2 divisors, whose sum is σ = 20220223203422. Its totient is φ = 20220223203420.

The previous prime is 20220223203409. The next prime is 20220223203493. The reversal of 20220223203421 is 12430232202202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18992251160100 + 1227972043321 = 4358010^2 + 1108139^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220223203421 - 2¹⁷ = 20220223072349 is a prime.

It is a super-2 number, since 2×20220223203421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220223209421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110111601710 + 10110111601711.

It is an arithmetic number, because the mean of its divisors is an integer number (10110111601711).

Almost surely, 2^{20220223203421} is an apocalyptic number.

It is an amenable number.

20220223203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220223203421 is an equidigital number, since it uses as much as digits as its factorization.

20220223203421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20220223203421 its reverse (12430232202202), we get a palindrome (32650455405623).

The spelling of 20220223203421 in words is "twenty trillion, two hundred twenty billion, two hundred twenty-three million, two hundred three thousand, four hundred twenty-one".