42154221271 has 2 divisors, whose sum is σ = 42154221272. Its totient is φ = 42154221270.

The previous prime is 42154221257. The next prime is 42154221367. The reversal of 42154221271 is 17212245124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42154221271 - 2¹⁹ = 42153696983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42154221671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077110635 + 21077110636.

It is an arithmetic number, because the mean of its divisors is an integer number (21077110636).

Almost surely, 2^42154221271 is an apocalyptic number.

42154221271 is a deficient number, since it is larger than the sum of its proper divisors (1).

42154221271 is an equidigital number, since it uses as much as digits as its factorization.

42154221271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 31.

Adding to 42154221271 its reverse (17212245124), we get a palindrome (59366466395).

The spelling of 42154221271 in words is "forty-two billion, one hundred fifty-four million, two hundred twenty-one thousand, two hundred seventy-one".