51021121610 has 16 divisors (see below), whose sum is σ = 96671599200. Its totient is φ = 19334319696.

The previous prime is 51021121603. The next prime is 51021121649. The reversal of 51021121610 is 1612112015.

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, 134265920 + ... + 134266299.

It is an arithmetic number, because the mean of its divisors is an integer number (6041974950).

Almost surely, 2^51021121610 is an apocalyptic number.

51021121610 is a deficient number, since it is larger than the sum of its proper divisors (45650477590).

51021121610 is a wasteful number, since it uses less digits than its factorization.

51021121610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268532245.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 51021121610 its reverse (1612112015), we get a palindrome (52633233625).

The spelling of 51021121610 in words is "fifty-one billion, twenty-one million, one hundred twenty-one thousand, six hundred ten".