260113621421 has 2 divisors, whose sum is σ = 260113621422. Its totient is φ = 260113621420.

The previous prime is 260113621387. The next prime is 260113621451. The reversal of 260113621421 is 124126311062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256127088100 + 3986533321 = 506090^2 + 63139^2 .

It is a cyclic number.

It is not a de Polignac number, because 260113621421 - 2²² = 260109427117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260113621451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130056810710 + 130056810711.

It is an arithmetic number, because the mean of its divisors is an integer number (130056810711).

Almost surely, 2^260113621421 is an apocalyptic number.

It is an amenable number.

260113621421 is a deficient number, since it is larger than the sum of its proper divisors (1).

260113621421 is an equidigital number, since it uses as much as digits as its factorization.

260113621421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 260113621421 its reverse (124126311062), we get a palindrome (384239932483).

The spelling of 260113621421 in words is "two hundred sixty billion, one hundred thirteen million, six hundred twenty-one thousand, four hundred twenty-one".