1220112002 has 8 divisors (see below), whose sum is σ = 1831516812. Its totient is φ = 609606400.

The previous prime is 1220111939. The next prime is 1220112007. The reversal of 1220112002 is 2002110221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1139130001 + 80982001 = 33751^2 + 8999^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1220112007) 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, 221399 + ... + 226842.

Almost surely, 2^1220112002 is an apocalyptic number.

1220112002 is a deficient number, since it is larger than the sum of its proper divisors (611404810).

1220112002 is a wasteful number, since it uses less digits than its factorization.

1220112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449604.

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

The square root of 1220112002 is about 34930.1016603158. The cubic root of 1220112002 is about 1068.5624279097.

Adding to 1220112002 its reverse (2002110221), we get a palindrome (3222222223).

The spelling of 1220112002 in words is "one billion, two hundred twenty million, one hundred twelve thousand, two".