53021429221 has 2 divisors, whose sum is σ = 53021429222. Its totient is φ = 53021429220.

The previous prime is 53021429207. The next prime is 53021429239. The reversal of 53021429221 is 12292412035.

53021429221 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., 49333296321 + 3688132900 = 222111^2 + 60730^2 .

It is a cyclic number.

It is not a de Polignac number, because 53021429221 - 2⁵ = 53021429189 is a prime.

It is a super-2 number, since 2×53021429221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53021429291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26510714610 + 26510714611.

It is an arithmetic number, because the mean of its divisors is an integer number (26510714611).

Almost surely, 2^53021429221 is an apocalyptic number.

It is an amenable number.

53021429221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53021429221 is an equidigital number, since it uses as much as digits as its factorization.

53021429221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 53021429221 in words is "fifty-three billion, twenty-one million, four hundred twenty-nine thousand, two hundred twenty-one".