1200021212213 has 4 divisors (see below), whose sum is σ = 1200939362880. Its totient is φ = 1199103061548.

The previous prime is 1200021212147. The next prime is 1200021212219. The reversal of 1200021212213 is 3122121200021.

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 1200021212213 - 2¹⁶ = 1200021146677 is a prime.

It is a super-2 number, since 2×1200021212213² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200021212191 and 1200021212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021212219) 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, 459073373 + ... + 459075986.

It is an arithmetic number, because the mean of its divisors is an integer number (300234840720).

Almost surely, 2^{1200021212213} is an apocalyptic number.

It is an amenable number.

1200021212213 is a deficient number, since it is larger than the sum of its proper divisors (918150667).

1200021212213 is an equidigital number, since it uses as much as digits as its factorization.

1200021212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918150666.

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

Adding to 1200021212213 its reverse (3122121200021), we get a palindrome (4322142412234).

The spelling of 1200021212213 in words is "one trillion, two hundred billion, twenty-one million, two hundred twelve thousand, two hundred thirteen".