1200112021 has 8 divisors (see below), whose sum is σ = 1245250304. Its totient is φ = 1155375360.

The previous prime is 1200112003. The next prime is 1200112037. The reversal of 1200112021 is 1202110021.

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 1200112021 - 2²³ = 1191723413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200111989 and 1200112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200112051) 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, 94311 + ... + 106276.

It is an arithmetic number, because the mean of its divisors is an integer number (155656288).

Almost surely, 2^1200112021 is an apocalyptic number.

It is an amenable number.

1200112021 is a deficient number, since it is larger than the sum of its proper divisors (45138283).

1200112021 is a wasteful number, since it uses less digits than its factorization.

1200112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200811.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1200112021 is about 34642.6329975076. The cubic root of 1200112021 is about 1062.6916348414.

Adding to 1200112021 its reverse (1202110021), we get a palindrome (2402222042).

The spelling of 1200112021 in words is "one billion, two hundred million, one hundred twelve thousand, twenty-one".