42715422121 has 2 divisors, whose sum is σ = 42715422122. Its totient is φ = 42715422120.

The previous prime is 42715422119. The next prime is 42715422151. The reversal of 42715422121 is 12122451724.

42715422121 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., 37631732121 + 5083690000 = 193989^2 + 71300^2 .

It is a cyclic number.

It is not a de Polignac number, because 42715422121 - 2¹ = 42715422119 is a prime.

It is a super-2 number, since 2×42715422121² (a number of 22 digits) contains 22 as substring.

Together with 42715422119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42715422151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21357711060 + 21357711061.

It is an arithmetic number, because the mean of its divisors is an integer number (21357711061).

Almost surely, 2^42715422121 is an apocalyptic number.

It is an amenable number.

42715422121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42715422121 is an equidigital number, since it uses as much as digits as its factorization.

42715422121 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 42715422121 its reverse (12122451724), we get a palindrome (54837873845).

The spelling of 42715422121 in words is "forty-two billion, seven hundred fifteen million, four hundred twenty-two thousand, one hundred twenty-one".