42012235481 has 2 divisors, whose sum is σ = 42012235482. Its totient is φ = 42012235480.

The previous prime is 42012235399. The next prime is 42012235483. The reversal of 42012235481 is 18453221024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42006552025 + 5683456 = 204955^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 42012235481 - 2²² = 42008041177 is a prime.

It is a super-2 number, since 2×42012235481² (a number of 22 digits) contains 22 as substring.

Together with 42012235483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42012235483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006117740 + 21006117741.

It is an arithmetic number, because the mean of its divisors is an integer number (21006117741).

Almost surely, 2^42012235481 is an apocalyptic number.

It is an amenable number.

42012235481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42012235481 is an equidigital number, since it uses as much as digits as its factorization.

42012235481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 42012235481 in words is "forty-two billion, twelve million, two hundred thirty-five thousand, four hundred eighty-one".