20122041421 has 2 divisors, whose sum is σ = 20122041422. Its totient is φ = 20122041420.

The previous prime is 20122041403. The next prime is 20122041437. The reversal of 20122041421 is 12414022102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12933375625 + 7188665796 = 113725^2 + 84786^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122041421 - 2⁵ = 20122041389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122041451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061020710 + 10061020711.

It is an arithmetic number, because the mean of its divisors is an integer number (10061020711).

Almost surely, 2^20122041421 is an apocalyptic number.

It is an amenable number.

20122041421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122041421 is an equidigital number, since it uses as much as digits as its factorization.

20122041421 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 20122041421 its reverse (12414022102), we get a palindrome (32536063523).

The spelling of 20122041421 in words is "twenty billion, one hundred twenty-two million, forty-one thousand, four hundred twenty-one".