51021101131013 has 8 divisors (see below), whose sum is σ = 55432047248088. Its totient is φ = 46679618732544.

The previous prime is 51021101131001. The next prime is 51021101131031. The reversal of 51021101131013 is 31013110112015.

It can be written as a sum of positive squares in 4 ways, for example, as 11951388298084 + 39069712832929 = 3457078^2 + 6250577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51021101131013 - 2¹⁰ = 51021101129989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51021101131313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17365928120 + ... + 17365931057.

It is an arithmetic number, because the mean of its divisors is an integer number (6929005906011).

Almost surely, 2^{51021101131013} is an apocalyptic number.

It is an amenable number.

51021101131013 is a deficient number, since it is larger than the sum of its proper divisors (4410946117075).

51021101131013 is a wasteful number, since it uses less digits than its factorization.

51021101131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34731859303.

The product of its (nonzero) digits is 90, while the sum is 20.

Adding to 51021101131013 its reverse (31013110112015), we get a palindrome (82034211243028).

The spelling of 51021101131013 in words is "fifty-one trillion, twenty-one billion, one hundred one million, one hundred thirty-one thousand, thirteen".