142221011 has 4 divisors (see below), whose sum is σ = 143163024. Its totient is φ = 141279000.

The previous prime is 142220999. The next prime is 142221019. The reversal of 142221011 is 110122241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110122241 = 5107 ⋅21563.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142221011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142221019) 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, 470780 + ... + 471081.

It is an arithmetic number, because the mean of its divisors is an integer number (35790756).

Almost surely, 2^142221011 is an apocalyptic number.

142221011 is a deficient number, since it is larger than the sum of its proper divisors (942013).

142221011 is an equidigital number, since it uses as much as digits as its factorization.

142221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942012.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 142221011 is about 11925.6450978553. The cubic root of 142221011 is about 521.9808703471.

Adding to 142221011 its reverse (110122241), we get a palindrome (252343252).

The spelling of 142221011 in words is "one hundred forty-two million, two hundred twenty-one thousand, eleven".