1200022231 has 4 divisors (see below), whose sum is σ = 1270611792. Its totient is φ = 1129432672.

The previous prime is 1200022223. The next prime is 1200022247. The reversal of 1200022231 is 1322200021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1322200021 = 41 ⋅32248781.

It is not a de Polignac number, because 1200022231 - 2³ = 1200022223 is a prime.

It is a super-2 number, since 2×1200022231² = 2880106709788434722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200022931) 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 3 ways as a sum of consecutive naturals, for example, 35294755 + ... + 35294788.

It is an arithmetic number, because the mean of its divisors is an integer number (317652948).

Almost surely, 2^1200022231 is an apocalyptic number.

1200022231 is a deficient number, since it is larger than the sum of its proper divisors (70589561).

1200022231 is an equidigital number, since it uses as much as digits as its factorization.

1200022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70589560.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1200022231 is about 34641.3370267373. The cubic root of 1200022231 is about 1062.6651313539.

Adding to 1200022231 its reverse (1322200021), we get a palindrome (2522222252).

The spelling of 1200022231 in words is "one billion, two hundred million, twenty-two thousand, two hundred thirty-one".