1200212011 has 4 divisors (see below), whose sum is σ = 1200487792. Its totient is φ = 1199936232.

The previous prime is 1200211997. The next prime is 1200212017. The reversal of 1200212011 is 1102120021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102120021 = 3433 ⋅321037.

It is a cyclic number.

It is not a de Polignac number, because 1200212011 - 2⁵ = 1200211979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200212017) 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, 131256 + ... + 140101.

It is an arithmetic number, because the mean of its divisors is an integer number (300121948).

Almost surely, 2^1200212011 is an apocalyptic number.

1200212011 is a deficient number, since it is larger than the sum of its proper divisors (275781).

1200212011 is an equidigital number, since it uses as much as digits as its factorization.

1200212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275780.

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

The square root of 1200212011 is about 34644.0761314254. The cubic root of 1200212011 is about 1062.7211475268.

Adding to 1200212011 its reverse (1102120021), we get a palindrome (2302332032).

The spelling of 1200212011 in words is "one billion, two hundred million, two hundred twelve thousand, eleven".