1220002002 has 12 divisors (see below), whose sum is σ = 2643337710. Its totient is φ = 406667328.

The previous prime is 1220001973. The next prime is 1220002019. The reversal of 1220002002 is 2002000221.

It can be written as a sum of positive squares in only one way, i.e., 1025984961 + 194017041 = 32031^2 + 13929^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

1220002002 is a modest number, since divided by 2002 gives 1220 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33888927 + ... + 33888962.

Almost surely, 2^1220002002 is an apocalyptic number.

1220002002 is an abundant number, since it is smaller than the sum of its proper divisors (1423335708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220002002 is a wasteful number, since it uses less digits than its factorization.

1220002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67777897 (or 67777894 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1220002002 is about 34928.5270516808. The cubic root of 1220002002 is about 1068.5303146285.

Adding to 1220002002 its reverse (2002000221), we get a palindrome (3222002223).

The spelling of 1220002002 in words is "one billion, two hundred twenty million, two thousand, two".