1200021093 has 6 divisors (see below), whose sum is σ = 1733363814. Its totient is φ = 800014056.

The previous prime is 1200021079. The next prime is 1200021101. The reversal of 1200021093 is 3901200021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1115693604 + 84327489 = 33402^2 + 9183^2 .

It is not a de Polignac number, because 1200021093 - 2⁴ = 1200021077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66667830 + ... + 66667847.

It is an arithmetic number, because the mean of its divisors is an integer number (288893969).

Almost surely, 2^1200021093 is an apocalyptic number.

It is an amenable number.

1200021093 is a deficient number, since it is larger than the sum of its proper divisors (533342721).

1200021093 is a wasteful number, since it uses less digits than its factorization.

1200021093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133335683 (or 133335680 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1200021093 is about 34641.3206012704. The cubic root of 1200021093 is about 1062.6647954398.

The spelling of 1200021093 in words is "one billion, two hundred million, twenty-one thousand, ninety-three".