121221006 has 16 divisors (see below), whose sum is σ = 242611200. Its totient is φ = 40378808.

The previous prime is 121220993. The next prime is 121221013. The reversal of 121221006 is 600122121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3475 + ... + 15953.

It is an arithmetic number, because the mean of its divisors is an integer number (15163200).

Almost surely, 2^121221006 is an apocalyptic number.

121221006 is an abundant number, since it is smaller than the sum of its proper divisors (121390194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221006 is a wasteful number, since it uses less digits than its factorization.

121221006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14103.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121221006 is about 11010.0411443373. The cubic root of 121221006 is about 494.9096947801.

Adding to 121221006 its reverse (600122121), we get a palindrome (721343127).

The spelling of 121221006 in words is "one hundred twenty-one million, two hundred twenty-one thousand, six".