121111101 has 24 divisors (see below), whose sum is σ = 180337664. Its totient is φ = 78265440.

The previous prime is 121111093. The next prime is 121111103. The reversal of 121111101 is 101111121.

It is not a de Polignac number, because 121111101 - 2³ = 121111093 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121716 + ... + 122706.

Almost surely, 2^121111101 is an apocalyptic number.

It is an amenable number.

121111101 is a deficient number, since it is larger than the sum of its proper divisors (59226563).

121111101 is a wasteful number, since it uses less digits than its factorization.

121111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 121111101 is about 11005.0488867610. The cubic root of 121111101 is about 494.7600796307.

Adding to 121111101 its reverse (101111121), we get a palindrome (222222222).

The spelling of 121111101 in words is "one hundred twenty-one million, one hundred eleven thousand, one hundred one".