1200020222101 has 4 divisors (see below), whose sum is σ = 1200028157100. Its totient is φ = 1200012287104.

The previous prime is 1200020222087. The next prime is 1200020222113. The reversal of 1200020222101 is 1012220200021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 527293822500 + 672726399601 = 726150^2 + 820199^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200020222101 - 2¹⁷ = 1200020091029 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 (1200020222131) 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, 3736156 + ... + 4044613.

It is an arithmetic number, because the mean of its divisors is an integer number (300007039275).

Almost surely, 2^{1200020222101} is an apocalyptic number.

It is an amenable number.

1200020222101 is a deficient number, since it is larger than the sum of its proper divisors (7934999).

1200020222101 is an equidigital number, since it uses as much as digits as its factorization.

1200020222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934998.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200020222101 its reverse (1012220200021), we get a palindrome (2212240422122).

The spelling of 1200020222101 in words is "one trillion, two hundred billion, twenty million, two hundred twenty-two thousand, one hundred one".