122001111 has 12 divisors (see below), whose sum is σ = 178205040. Its totient is φ = 80419680.

The previous prime is 122001107. The next prime is 122001133. The reversal of 122001111 is 111100221.

It is a happy number.

It is not a de Polignac number, because 122001111 - 2² = 122001107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 122001093 and 122001102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122001101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75355 + ... + 76956.

It is an arithmetic number, because the mean of its divisors is an integer number (14850420).

Almost surely, 2^122001111 is an apocalyptic number.

122001111 is a deficient number, since it is larger than the sum of its proper divisors (56203929).

122001111 is a wasteful number, since it uses less digits than its factorization.

122001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152406 (or 152403 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 122001111 is about 11045.4113096797. The cubic root of 122001111 is about 495.9690718987.

Adding to 122001111 its reverse (111100221), we get a palindrome (233101332).

The spelling of 122001111 in words is "one hundred twenty-two million, one thousand, one hundred eleven".