142221123 has 32 divisors (see below), whose sum is σ = 230630400. Its totient is φ = 85903200.

The previous prime is 142221097. The next prime is 142221139. The reversal of 142221123 is 321122241.

It is a happy number.

142221123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142221123 - 2⁵ = 142221091 is a prime.

It is a super-2 number, since 2×142221123² = 40453695654762258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142221096 and 142221105.

It is not an unprimeable number, because it can be changed into a prime (142221173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114918 + ... + 116148.

It is an arithmetic number, because the mean of its divisors is an integer number (7207200).

Almost surely, 2^142221123 is an apocalyptic number.

142221123 is a deficient number, since it is larger than the sum of its proper divisors (88409277).

142221123 is a wasteful number, since it uses less digits than its factorization.

142221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1634 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 142221123 is about 11925.6497936171. The cubic root of 142221123 is about 521.9810073682.

Adding to 142221123 its reverse (321122241), we get a palindrome (463343364).

The spelling of 142221123 in words is "one hundred forty-two million, two hundred twenty-one thousand, one hundred twenty-three".