42510244121 has 2 divisors, whose sum is σ = 42510244122. Its totient is φ = 42510244120.

The previous prime is 42510244079. The next prime is 42510244199. The reversal of 42510244121 is 12144201524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41072696896 + 1437547225 = 202664^2 + 37915^2 .

It is a cyclic number.

It is not a de Polignac number, because 42510244121 - 2¹⁸ = 42509981977 is a prime.

It is not a weakly prime, because it can be changed into another prime (42510249121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21255122060 + 21255122061.

It is an arithmetic number, because the mean of its divisors is an integer number (21255122061).

Almost surely, 2^42510244121 is an apocalyptic number.

It is an amenable number.

42510244121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42510244121 is an equidigital number, since it uses as much as digits as its factorization.

42510244121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 42510244121 its reverse (12144201524), we get a palindrome (54654445645).

The spelling of 42510244121 in words is "forty-two billion, five hundred ten million, two hundred forty-four thousand, one hundred twenty-one".