53212455021 has 16 divisors (see below), whose sum is σ = 81952872768. Its totient is φ = 30352915200.

The previous prime is 53212455011. The next prime is 53212455029. The reversal of 53212455021 is 12055421235.

53212455021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53212455021 - 2¹⁰ = 53212453997 is a prime.

It is a super-2 number, since 2×53212455021² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53212455021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53212455029) 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, 47425870 + ... + 47426991.

It is an arithmetic number, because the mean of its divisors is an integer number (5122054548).

Almost surely, 2^53212455021 is an apocalyptic number.

53212455021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

53212455021 is a deficient number, since it is larger than the sum of its proper divisors (28740417747).

53212455021 is a wasteful number, since it uses less digits than its factorization.

53212455021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94852892.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 53212455021 its reverse (12055421235), we get a palindrome (65267876256).

The spelling of 53212455021 in words is "fifty-three billion, two hundred twelve million, four hundred fifty-five thousand, twenty-one".