142221117 has 8 divisors (see below), whose sum is σ = 189689824. Its totient is φ = 94783248.

The previous prime is 142221097. The next prime is 142221139. The reversal of 142221117 is 711122241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142221117 - 2⁷ = 142220989 is a prime.

It is a super-2 number, since 2×142221117² = 40453692241455378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142221093 and 142221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142221187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7143 + ... + 18315.

It is an arithmetic number, because the mean of its divisors is an integer number (23711228).

Almost surely, 2^142221117 is an apocalyptic number.

It is an amenable number.

142221117 is a deficient number, since it is larger than the sum of its proper divisors (47468707).

142221117 is a wasteful number, since it uses less digits than its factorization.

142221117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15419.

The product of its digits is 224, while the sum is 21.

The square root of 142221117 is about 11925.6495420585. The cubic root of 142221117 is about 521.9810000277.

Adding to 142221117 its reverse (711122241), we get a palindrome (853343358).

The spelling of 142221117 in words is "one hundred forty-two million, two hundred twenty-one thousand, one hundred seventeen".