42220149991 has 2 divisors, whose sum is σ = 42220149992. Its totient is φ = 42220149990.

The previous prime is 42220149977. The next prime is 42220150001. The reversal of 42220149991 is 19994102224.

42220149991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42220149991 - 2⁷ = 42220149863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42220149941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110074995 + 21110074996.

It is an arithmetic number, because the mean of its divisors is an integer number (21110074996).

Almost surely, 2^42220149991 is an apocalyptic number.

42220149991 is a deficient number, since it is larger than the sum of its proper divisors (1).

42220149991 is an equidigital number, since it uses as much as digits as its factorization.

42220149991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 42220149991 in words is "forty-two billion, two hundred twenty million, one hundred forty-nine thousand, nine hundred ninety-one".