42121255469 has 2 divisors, whose sum is σ = 42121255470. Its totient is φ = 42121255468.

The previous prime is 42121255417. The next prime is 42121255499. The reversal of 42121255469 is 96455212124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29162392900 + 12958862569 = 170770^2 + 113837^2 .

It is a cyclic number.

It is not a de Polignac number, because 42121255469 - 2³² = 37826288173 is a prime.

It is a super-2 number, since 2×42121255469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121255499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060627734 + 21060627735.

It is an arithmetic number, because the mean of its divisors is an integer number (21060627735).

Almost surely, 2^42121255469 is an apocalyptic number.

It is an amenable number.

42121255469 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121255469 is an equidigital number, since it uses as much as digits as its factorization.

42121255469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The spelling of 42121255469 in words is "forty-two billion, one hundred twenty-one million, two hundred fifty-five thousand, four hundred sixty-nine".