51021101252 has 24 divisors (see below), whose sum is σ = 99054839520. Its totient is φ = 22798333760.

The previous prime is 51021101203. The next prime is 51021101281. The reversal of 51021101252 is 25210112015.

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, 9824273 + ... + 9829464.

It is an arithmetic number, because the mean of its divisors is an integer number (4127284980).

Almost surely, 2^51021101252 is an apocalyptic number.

It is an amenable number.

51021101252 is a deficient number, since it is larger than the sum of its proper divisors (48033738268).

51021101252 is a wasteful number, since it uses less digits than its factorization.

51021101252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19653811 (or 19653809 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 51021101252 its reverse (25210112015), we get a palindrome (76231213267).

The spelling of 51021101252 in words is "fifty-one billion, twenty-one million, one hundred one thousand, two hundred fifty-two".