1200021122213 has 8 divisors (see below), whose sum is σ = 1242022853880. Its totient is φ = 1158060836800.

The previous prime is 1200021122207. The next prime is 1200021122233. The reversal of 1200021122213 is 3122211200021.

It can be written as a sum of positive squares in 4 ways, for example, as 117884415649 + 1082136706564 = 343343^2 + 1040258^2 .

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 1200021122213 - 2⁴ = 1200021122197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200021122191 and 1200021122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021122233) 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, 10302638 + ... + 10418463.

It is an arithmetic number, because the mean of its divisors is an integer number (155252856735).

Almost surely, 2^{1200021122213} is an apocalyptic number.

It is an amenable number.

1200021122213 is a deficient number, since it is larger than the sum of its proper divisors (42001731667).

1200021122213 is a wasteful number, since it uses less digits than its factorization.

1200021122213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20723127.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1200021122213 its reverse (3122211200021), we get a palindrome (4322232322234).

The spelling of 1200021122213 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-two thousand, two hundred thirteen".