1200021122 has 8 divisors (see below), whose sum is σ = 1801490556. Its totient is φ = 599524272.

The previous prime is 1200021107. The next prime is 1200021149. The reversal of 1200021122 is 2211200021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1199860321 + 160801 = 34639^2 + 401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1200021122² = 2880101386492277768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240053 + ... + 245000.

Almost surely, 2^1200021122 is an apocalyptic number.

1200021122 is a deficient number, since it is larger than the sum of its proper divisors (601469434).

1200021122 is a wasteful number, since it uses less digits than its factorization.

1200021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486292.

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

The square root of 1200021122 is about 34641.3210198456. The cubic root of 1200021122 is about 1062.6648040000.

Adding to 1200021122 its reverse (2211200021), we get a palindrome (3411221143).

The spelling of 1200021122 in words is "one billion, two hundred million, twenty-one thousand, one hundred twenty-two".