1200221021001 has 32 divisors (see below), whose sum is σ = 1646364054528. Its totient is φ = 777188079360.

The previous prime is 1200221020979. The next prime is 1200221021063. The reversal of 1200221021001 is 1001201220021.

It is not a de Polignac number, because 1200221021001 - 2³³ = 1191631086409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200221028001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206468971 + ... + 206474783.

It is an arithmetic number, because the mean of its divisors is an integer number (51448876704).

Almost surely, 2^{1200221021001} is an apocalyptic number.

It is an amenable number.

1200221021001 is a deficient number, since it is larger than the sum of its proper divisors (446143033527).

1200221021001 is a wasteful number, since it uses less digits than its factorization.

1200221021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200221021001 its reverse (1001201220021), we get a palindrome (2201422241022).

The spelling of 1200221021001 in words is "one trillion, two hundred billion, two hundred twenty-one million, twenty-one thousand, one".