142121123 has 2 divisors, whose sum is σ = 142121124. Its totient is φ = 142121122.

The previous prime is 142121113. The next prime is 142121131. The reversal of 142121123 is 321121241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142121123 - 2²² = 137926819 is a prime.

It is a super-2 number, since 2×142121123² = 40396827205562258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142121113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71060561 + 71060562.

It is an arithmetic number, because the mean of its divisors is an integer number (71060562).

Almost surely, 2^142121123 is an apocalyptic number.

142121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

142121123 is an equidigital number, since it uses as much as digits as its factorization.

142121123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 142121123 is about 11921.4564127039. The cubic root of 142121123 is about 521.8586384391.

Adding to 142121123 its reverse (321121241), we get a palindrome (463242364).

The spelling of 142121123 in words is "one hundred forty-two million, one hundred twenty-one thousand, one hundred twenty-three".