1220022002 has 4 divisors (see below), whose sum is σ = 1830033006. Its totient is φ = 610011000.

The previous prime is 1220021989. The next prime is 1220022029. The reversal of 1220022002 is 2002200221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1195707241 + 24314761 = 34579^2 + 4931^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305005499 + ... + 305005502.

Almost surely, 2^1220022002 is an apocalyptic number.

1220022002 is a deficient number, since it is larger than the sum of its proper divisors (610011004).

1220022002 is an equidigital number, since it uses as much as digits as its factorization.

1220022002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610011003.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1220022002 is about 34928.8133494397. The cubic root of 1220022002 is about 1068.5361535505.

Adding to 1220022002 its reverse (2002200221), we get a palindrome (3222222223).

The spelling of 1220022002 in words is "one billion, two hundred twenty million, twenty-two thousand, two".