142022221 has 8 divisors (see below), whose sum is σ = 155150784. Its totient is φ = 128929920.

The previous prime is 142022197. The next prime is 142022227. The reversal of 142022221 is 122220241.

142022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 142022221 - 2¹¹ = 142020173 is a prime.

It is a super-2 number, since 2×142022221² = 40340622515545682, 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 = 142022195 and 142022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142022227) 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, 516 + ... + 16861.

It is an arithmetic number, because the mean of its divisors is an integer number (19393848).

Almost surely, 2^142022221 is an apocalyptic number.

142022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142022221 is a deficient number, since it is larger than the sum of its proper divisors (13128563).

142022221 is a wasteful number, since it uses less digits than its factorization.

142022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18131.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 142022221 is about 11917.3076237882. The cubic root of 142022221 is about 521.7375566485.

Adding to 142022221 its reverse (122220241), we get a palindrome (264242462).

The spelling of 142022221 in words is "one hundred forty-two million, twenty-two thousand, two hundred twenty-one".