52221151421 has 2 divisors, whose sum is σ = 52221151422. Its totient is φ = 52221151420.

The previous prime is 52221151391. The next prime is 52221151519. The reversal of 52221151421 is 12415112225.

It is a happy number.

52221151421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35236545796 + 16984605625 = 187714^2 + 130325^2 .

It is a cyclic number.

It is not a de Polignac number, because 52221151421 - 2⁶ = 52221151357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52221151621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26110575710 + 26110575711.

It is an arithmetic number, because the mean of its divisors is an integer number (26110575711).

Almost surely, 2^52221151421 is an apocalyptic number.

It is an amenable number.

52221151421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52221151421 is an equidigital number, since it uses as much as digits as its factorization.

52221151421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 26.

Adding to 52221151421 its reverse (12415112225), we get a palindrome (64636263646).

The spelling of 52221151421 in words is "fifty-two billion, two hundred twenty-one million, one hundred fifty-one thousand, four hundred twenty-one".