42191227501 has 2 divisors, whose sum is σ = 42191227502. Its totient is φ = 42191227500.

The previous prime is 42191227483. The next prime is 42191227583. The reversal of 42191227501 is 10572219124.

42191227501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34674164100 + 7517063401 = 186210^2 + 86701^2 .

It is a cyclic number.

It is not a de Polignac number, because 42191227501 - 2⁵ = 42191227469 is a prime.

It is a super-2 number, since 2×42191227501² (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 (42191227201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21095613750 + 21095613751.

It is an arithmetic number, because the mean of its divisors is an integer number (21095613751).

Almost surely, 2^42191227501 is an apocalyptic number.

It is an amenable number.

42191227501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42191227501 is an equidigital number, since it uses as much as digits as its factorization.

42191227501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 42191227501 in words is "forty-two billion, one hundred ninety-one million, two hundred twenty-seven thousand, five hundred one".