121066009 has 3 divisors (see below), whose sum is σ = 121077013. Its totient is φ = 121055006.

The previous prime is 121066007. The next prime is 121066021. The reversal of 121066009 is 900660121.

The square root of 121066009 is 11003.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 900660121 = 30011².

It is not a de Polignac number, because 121066009 - 2¹ = 121066007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121066007) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5502 + ... + 16504.

Almost surely, 2^121066009 is an apocalyptic number.

121066009 is the 11003-rd square number.

121066009 is the 5502-nd centered octagonal number.

It is an amenable number.

121066009 is a deficient number, since it is larger than the sum of its proper divisors (11004).

121066009 is an frugal number, since it uses more digits than its factorization.

121066009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22006 (or 11003 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The cubic root of 121066009 is about 494.6986691003.

Multiplying 121066009 by its sum of digits (25), we get a square (3026650225 = 55015²).

The spelling of 121066009 in words is "one hundred twenty-one million, sixty-six thousand, nine".