20224101421 has 2 divisors, whose sum is σ = 20224101422. Its totient is φ = 20224101420.

The previous prime is 20224101389. The next prime is 20224101433. The reversal of 20224101421 is 12410142202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17792625321 + 2431476100 = 133389^2 + 49310^2 .

It is a cyclic number.

It is not a de Polignac number, because 20224101421 - 2⁵ = 20224101389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20224101451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112050710 + 10112050711.

It is an arithmetic number, because the mean of its divisors is an integer number (10112050711).

Almost surely, 2^20224101421 is an apocalyptic number.

It is an amenable number.

20224101421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224101421 is an equidigital number, since it uses as much as digits as its factorization.

20224101421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20224101421 its reverse (12410142202), we get a palindrome (32634243623).

The spelling of 20224101421 in words is "twenty billion, two hundred twenty-four million, one hundred one thousand, four hundred twenty-one".