133220111 has 16 divisors (see below), whose sum is σ = 140652288. Its totient is φ = 126048000.

The previous prime is 133220093. The next prime is 133220123. The reversal of 133220111 is 111022331.

It is not a de Polignac number, because 133220111 - 2⁶ = 133220047 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133220161) 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, 219170 + ... + 219776.

It is an arithmetic number, because the mean of its divisors is an integer number (8790768).

Almost surely, 2^133220111 is an apocalyptic number.

133220111 is a deficient number, since it is larger than the sum of its proper divisors (7432177).

133220111 is a wasteful number, since it uses less digits than its factorization.

133220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 133220111 is about 11542.1016717061. The cubic root of 133220111 is about 510.7283084083.

Adding to 133220111 its reverse (111022331), we get a palindrome (244242442).

It can be divided in two parts, 133220 and 111, that added together give a palindrome (133331).

The spelling of 133220111 in words is "one hundred thirty-three million, two hundred twenty thousand, one hundred eleven".