142220111 has 16 divisors (see below), whose sum is σ = 164540160. Its totient is φ = 121567680.

The previous prime is 142220107. The next prime is 142220137. The reversal of 142220111 is 111022241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 142220111 - 2² = 142220107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142220101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26150 + ... + 31116.

It is an arithmetic number, because the mean of its divisors is an integer number (10283760).

Almost surely, 2^142220111 is an apocalyptic number.

142220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142220111 is a deficient number, since it is larger than the sum of its proper divisors (22320049).

142220111 is a wasteful number, since it uses less digits than its factorization.

142220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5134.

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

The square root of 142220111 is about 11925.6073639878. The cubic root of 142220111 is about 521.9797692820.

Adding to 142220111 its reverse (111022241), we get a palindrome (253242352).

The spelling of 142220111 in words is "one hundred forty-two million, two hundred twenty thousand, one hundred eleven".