1001221221002 has 32 divisors (see below), whose sum is σ = 1583178670080. Its totient is φ = 474222677760.

The previous prime is 1001221220999. The next prime is 1001221221023. The reversal of 1001221221002 is 2001221221001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1070999 + ... + 1774677.

It is an arithmetic number, because the mean of its divisors is an integer number (49474333440).

Almost surely, 2^{1001221221002} is an apocalyptic number.

1001221221002 is a deficient number, since it is larger than the sum of its proper divisors (581957449078).

1001221221002 is a wasteful number, since it uses less digits than its factorization.

1001221221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704198.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1001221221002 its reverse (2001221221001), we get a palindrome (3002442442003).

Subtracting 1001221221002 from its reverse (2001221221001), we obtain a palindrome (999999999999).

The spelling of 1001221221002 in words is "one trillion, one billion, two hundred twenty-one million, two hundred twenty-one thousand, two".