51021040122 has 48 divisors (see below), whose sum is σ = 119131820808. Its totient is φ = 15687872640.

The previous prime is 51021040013. The next prime is 51021040123. The reversal of 51021040122 is 22104012015.

51021040122 is a `hidden beast` number, since 51 + 0 + 210 + 401 + 2 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 50818234041 + 202806081 = 225429^2 + 14241^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51021040095 and 51021040104.

It is not an unprimeable number, because it can be changed into a prime (51021040123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264972 + ... + 415032.

Almost surely, 2^51021040122 is an apocalyptic number.

51021040122 is an abundant number, since it is smaller than the sum of its proper divisors (68110780686).

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

51021040122 is a wasteful number, since it uses less digits than its factorization.

51021040122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151535 (or 151532 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 51021040122 its reverse (22104012015), we get a palindrome (73125052137).

The spelling of 51021040122 in words is "fifty-one billion, twenty-one million, forty thousand, one hundred twenty-two".