1201221006 has 64 divisors (see below), whose sum is σ = 2528064000. Its totient is φ = 380016000.

The previous prime is 1201220987. The next prime is 1201221011. The reversal of 1201221006 is 6001221021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3441720 + ... + 3442068.

It is an arithmetic number, because the mean of its divisors is an integer number (39501000).

Almost surely, 2^1201221006 is an apocalyptic number.

1201221006 is an abundant number, since it is smaller than the sum of its proper divisors (1326842994).

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

1201221006 is a wasteful number, since it uses less digits than its factorization.

1201221006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665.

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

The square root of 1201221006 is about 34658.6353741748. The cubic root of 1201221006 is about 1063.0188671444.

Adding to 1201221006 its sum of digits (15), we get a palindrome (1201221021).

Adding to 1201221006 its reverse (6001221021), we get a palindrome (7202442027).

The spelling of 1201221006 in words is "one billion, two hundred one million, two hundred twenty-one thousand, six".