1200221021101 has 4 divisors (see below), whose sum is σ = 1204784599392. Its totient is φ = 1195657442812.

The previous prime is 1200221021099. The next prime is 1200221021141. The reversal of 1200221021101 is 1011201220021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200221021101 - 2¹ = 1200221021099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200221021141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2281788751 + ... + 2281789276.

It is an arithmetic number, because the mean of its divisors is an integer number (301196149848).

Almost surely, 2^{1200221021101} is an apocalyptic number.

It is an amenable number.

1200221021101 is a deficient number, since it is larger than the sum of its proper divisors (4563578291).

1200221021101 is an equidigital number, since it uses as much as digits as its factorization.

1200221021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563578290.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200221021101 its reverse (1011201220021), we get a palindrome (2211422241122).

The spelling of 1200221021101 in words is "one trillion, two hundred billion, two hundred twenty-one million, twenty-one thousand, one hundred one".