51221435014012 has 6 divisors (see below), whose sum is σ = 89637511274528. Its totient is φ = 25610717507004.

The previous prime is 51221435014007. The next prime is 51221435014067. The reversal of 51221435014012 is 21041053412215.

It is a super-2 number, since 2×51221435014012² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402679376748 + ... + 6402679376755.

Almost surely, 2^{51221435014012} is an apocalyptic number.

It is an amenable number.

51221435014012 is a deficient number, since it is larger than the sum of its proper divisors (38416076260516).

51221435014012 is a wasteful number, since it uses less digits than its factorization.

51221435014012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805358753507 (or 12805358753505 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 51221435014012 its reverse (21041053412215), we get a palindrome (72262488426227).

The spelling of 51221435014012 in words is "fifty-one trillion, two hundred twenty-one billion, four hundred thirty-five million, fourteen thousand, twelve".