51103211012 has 24 divisors (see below), whose sum is σ = 108218565504. Its totient is φ = 20613059712.

The previous prime is 51103210979. The next prime is 51103211057. The reversal of 51103211012 is 21011230115.

It is a super-2 number, since 2×51103211012² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 53679368 + ... + 53680319.

It is an arithmetic number, because the mean of its divisors is an integer number (4509106896).

Almost surely, 2^51103211012 is an apocalyptic number.

It is an amenable number.

51103211012 is an abundant number, since it is smaller than the sum of its proper divisors (57115354492).

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

51103211012 is a wasteful number, since it uses less digits than its factorization.

51103211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107359715 (or 107359713 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 51103211012 its reverse (21011230115), we get a palindrome (72114441127).

The spelling of 51103211012 in words is "fifty-one billion, one hundred three million, two hundred eleven thousand, twelve".