5101421261 has 2 divisors, whose sum is σ = 5101421262. Its totient is φ = 5101421260.

The previous prime is 5101421239. The next prime is 5101421267. The reversal of 5101421261 is 1621241015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4098432361 + 1002988900 = 64019^2 + 31670^2 .

It is a cyclic number.

It is not a de Polignac number, because 5101421261 - 2⁶ = 5101421197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5101421267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550710630 + 2550710631.

It is an arithmetic number, because the mean of its divisors is an integer number (2550710631).

Almost surely, 2^5101421261 is an apocalyptic number.

It is an amenable number.

5101421261 is a deficient number, since it is larger than the sum of its proper divisors (1).

5101421261 is an equidigital number, since it uses as much as digits as its factorization.

5101421261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 5101421261 is about 71424.2344096176. The cubic root of 5101421261 is about 1721.4605024402.

Adding to 5101421261 its reverse (1621241015), we get a palindrome (6722662276).

The spelling of 5101421261 in words is "five billion, one hundred one million, four hundred twenty-one thousand, two hundred sixty-one".