42121035751 has 2 divisors, whose sum is σ = 42121035752. Its totient is φ = 42121035750.

The previous prime is 42121035721. The next prime is 42121035769. The reversal of 42121035751 is 15753012124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42121035751 - 2¹⁵ = 42121002983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121035721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060517875 + 21060517876.

It is an arithmetic number, because the mean of its divisors is an integer number (21060517876).

Almost surely, 2^42121035751 is an apocalyptic number.

42121035751 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121035751 is an equidigital number, since it uses as much as digits as its factorization.

42121035751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 42121035751 its reverse (15753012124), we get a palindrome (57874047875).

The spelling of 42121035751 in words is "forty-two billion, one hundred twenty-one million, thirty-five thousand, seven hundred fifty-one".