1211220002 has 4 divisors (see below), whose sum is σ = 1816830006. Its totient is φ = 605610000.

The previous prime is 1211219987. The next prime is 1211220011. The reversal of 1211220002 is 2000221121.

It is a happy number.

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., 932630521 + 278589481 = 30539^2 + 16691^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302804999 + ... + 302805002.

Almost surely, 2^1211220002 is an apocalyptic number.

1211220002 is a deficient number, since it is larger than the sum of its proper divisors (605610004).

1211220002 is an equidigital number, since it uses as much as digits as its factorization.

1211220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605610003.

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

The square root of 1211220002 is about 34802.5861395385. The cubic root of 1211220002 is about 1065.9602533443.

Adding to 1211220002 its reverse (2000221121), we get a palindrome (3211441123).

The spelling of 1211220002 in words is "one billion, two hundred eleven million, two hundred twenty thousand, two".