1200222101 has 8 divisors (see below), whose sum is σ = 1337117880. Its totient is φ = 1069693632.

The previous prime is 1200222097. The next prime is 1200222109. The reversal of 1200222101 is 1012220021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2992900 + 1197229201 = 1730^2 + 34601^2 .

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 1200222101 - 2² = 1200222097 is a prime.

It is a super-3 number, since 3×1200222101³ (a number of 28 digits) contains 333 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 (1200222109) 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, 1591430 + ... + 1592183.

It is an arithmetic number, because the mean of its divisors is an integer number (167139735).

Almost surely, 2^1200222101 is an apocalyptic number.

It is an amenable number.

1200222101 is a deficient number, since it is larger than the sum of its proper divisors (136895779).

1200222101 is a wasteful number, since it uses less digits than its factorization.

1200222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183655.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1200222101 is about 34644.2217548612. The cubic root of 1200222101 is about 1062.7241255635.

Adding to 1200222101 its reverse (1012220021), we get a palindrome (2212442122).

The spelling of 1200222101 in words is "one billion, two hundred million, two hundred twenty-two thousand, one hundred one".