42120122311 has 2 divisors, whose sum is σ = 42120122312. Its totient is φ = 42120122310.

The previous prime is 42120122309. The next prime is 42120122323. The reversal of 42120122311 is 11322102124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42120122311 - 2¹ = 42120122309 is a prime.

Together with 42120122309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42120722311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060061155 + 21060061156.

It is an arithmetic number, because the mean of its divisors is an integer number (21060061156).

Almost surely, 2^42120122311 is an apocalyptic number.

42120122311 is a deficient number, since it is larger than the sum of its proper divisors (1).

42120122311 is an equidigital number, since it uses as much as digits as its factorization.

42120122311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 42120122311 its reverse (11322102124), we get a palindrome (53442224435).

The spelling of 42120122311 in words is "forty-two billion, one hundred twenty million, one hundred twenty-two thousand, three hundred eleven".