133421111 has 2 divisors, whose sum is σ = 133421112. Its totient is φ = 133421110.

The previous prime is 133421081. The next prime is 133421147. The reversal of 133421111 is 111124331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133421111 - 2⁶ = 133421047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133421111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133421161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66710555 + 66710556.

It is an arithmetic number, because the mean of its divisors is an integer number (66710556).

Almost surely, 2^133421111 is an apocalyptic number.

133421111 is a deficient number, since it is larger than the sum of its proper divisors (1).

133421111 is an equidigital number, since it uses as much as digits as its factorization.

133421111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 133421111 is about 11550.8056428978. The cubic root of 133421111 is about 510.9850384264.

Adding to 133421111 its reverse (111124331), we get a palindrome (244545442).

The spelling of 133421111 in words is "one hundred thirty-three million, four hundred twenty-one thousand, one hundred eleven".