1200021221101 has 8 divisors (see below), whose sum is σ = 1250758106624. Its totient is φ = 1150035993360.

The previous prime is 1200021221071. The next prime is 1200021221167. The reversal of 1200021221101 is 1011221200021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200021221101 - 2⁷ = 1200021220973 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 (1200021201101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187911186 + ... + 187917571.

It is an arithmetic number, because the mean of its divisors is an integer number (156344763328).

Almost surely, 2^{1200021221101} is an apocalyptic number.

It is an amenable number.

1200021221101 is a deficient number, since it is larger than the sum of its proper divisors (50736885523).

1200021221101 is a wasteful number, since it uses less digits than its factorization.

1200021221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375828891.

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

Adding to 1200021221101 its reverse (1011221200021), we get a palindrome (2211242421122).

The spelling of 1200021221101 in words is "one trillion, two hundred billion, twenty-one million, two hundred twenty-one thousand, one hundred one".