5100420244921 has 9 divisors (see below), whose sum is σ = 5122218233199. Its totient is φ = 5078714656800.

The previous prime is 5100420244867. The next prime is 5100420244937. The reversal of 5100420244921 is 1294420240015.

The square root of 5100420244921 is 2258411.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3835875014521 + 1264545230400 = 1958539^2 + 1124520^2 .

It is not a de Polignac number, because 5100420244921 - 2¹³ = 5100420236729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5100420254921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 544272366 + ... + 544281736.

Almost surely, 2^{5100420244921} is an apocalyptic number.

5100420244921 is the 2258411-st square number.

5100420244921 is the 1129206-th centered octagonal number.

It is an amenable number.

5100420244921 is a deficient number, since it is larger than the sum of its proper divisors (21797988278).

5100420244921 is an frugal number, since it uses more digits than its factorization.

5100420244921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19224 (or 9612 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 5100420244921 its reverse (1294420240015), we get a palindrome (6394840484936).

The spelling of 5100420244921 in words is "five trillion, one hundred billion, four hundred twenty million, two hundred forty-four thousand, nine hundred twenty-one".