53121012 has 24 divisors (see below), whose sum is σ = 141656256. Its totient is φ = 15177408.

The previous prime is 53121001. The next prime is 53121031. The reversal of 53121012 is 21012135.

It is a junction number, because it is equal to n+sod(n) for n = 53120982 and 53121000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316113 + ... + 316280.

It is an arithmetic number, because the mean of its divisors is an integer number (5902344).

Almost surely, 2^53121012 is an apocalyptic number.

It is an amenable number.

53121012 is an abundant number, since it is smaller than the sum of its proper divisors (88535244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53121012 is a wasteful number, since it uses less digits than its factorization.

53121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632407 (or 632405 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 53121012 is about 7288.4162888792. The cubic root of 53121012 is about 375.9142421742.

Adding to 53121012 its reverse (21012135), we get a palindrome (74133147).

The spelling of 53121012 in words is "fifty-three million, one hundred twenty-one thousand, twelve".