53212210421 has 16 divisors (see below), whose sum is σ = 54127450800. Its totient is φ = 52305899520.

The previous prime is 53212210393. The next prime is 53212210523. The reversal of 53212210421 is 12401221235.

It can be written as a sum of positive squares in 8 ways, for example, as 47890507921 + 5321702500 = 218839^2 + 72950^2 .

It is a cyclic number.

It is not a de Polignac number, because 53212210421 - 2³⁴ = 36032341237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53212240421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12810881 + ... + 12815033.

It is an arithmetic number, because the mean of its divisors is an integer number (3382965675).

Almost surely, 2^53212210421 is an apocalyptic number.

It is an amenable number.

53212210421 is a deficient number, since it is larger than the sum of its proper divisors (915240379).

53212210421 is a wasteful number, since it uses less digits than its factorization.

53212210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 53212210421 its reverse (12401221235), we get a palindrome (65613431656).

The spelling of 53212210421 in words is "fifty-three billion, two hundred twelve million, two hundred ten thousand, four hundred twenty-one".