121500011 has 16 divisors (see below), whose sum is σ = 126382080. Its totient is φ = 116756640.

The previous prime is 121499993. The next prime is 121500019. The reversal of 121500011 is 110005121.

It is a cyclic number.

It is not a de Polignac number, because 121500011 - 2¹⁰ = 121498987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121499965 and 121500001.

It is not an unprimeable number, because it can be changed into a prime (121500019) 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, 927416 + ... + 927546.

It is an arithmetic number, because the mean of its divisors is an integer number (7898880).

Almost surely, 2^121500011 is an apocalyptic number.

121500011 is a deficient number, since it is larger than the sum of its proper divisors (4882069).

121500011 is a wasteful number, since it uses less digits than its factorization.

121500011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 121500011 is about 11022.7043414944. The cubic root of 121500011 is about 495.2891022812.

Adding to 121500011 its reverse (110005121), we get a palindrome (231505132).

The spelling of 121500011 in words is "one hundred twenty-one million, five hundred thousand, eleven".