142211123 has 4 divisors (see below), whose sum is σ = 142343040. Its totient is φ = 142079208.

The previous prime is 142211119. The next prime is 142211141. The reversal of 142211123 is 321112241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142211123 - 2² = 142211119 is a prime.

It is a super-2 number, since 2×142211123² = 40448007009842258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142211183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64328 + ... + 66501.

It is an arithmetic number, because the mean of its divisors is an integer number (35585760).

Almost surely, 2^142211123 is an apocalyptic number.

142211123 is a deficient number, since it is larger than the sum of its proper divisors (131917).

142211123 is a wasteful number, since it uses less digits than its factorization.

142211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131916.

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

The square root of 142211123 is about 11925.2305218809. The cubic root of 142211123 is about 521.9687730570.

Adding to 142211123 its reverse (321112241), we get a palindrome (463323364).

The spelling of 142211123 in words is "one hundred forty-two million, two hundred eleven thousand, one hundred twenty-three".