1216512002 has 4 divisors (see below), whose sum is σ = 1824768006. Its totient is φ = 608256000.

The previous prime is 1216511977. The next prime is 1216512029. The reversal of 1216512002 is 2002156121.

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., 1017673801 + 198838201 = 31901^2 + 14101^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304127999 + ... + 304128002.

Almost surely, 2^1216512002 is an apocalyptic number.

1216512002 is a deficient number, since it is larger than the sum of its proper divisors (608256004).

1216512002 is an equidigital number, since it uses as much as digits as its factorization.

1216512002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608256003.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1216512002 is about 34878.5321078740. The cubic root of 1216512002 is about 1067.5104440583.

Adding to 1216512002 its reverse (2002156121), we get a palindrome (3218668123).

The spelling of 1216512002 in words is "one billion, two hundred sixteen million, five hundred twelve thousand, two".