1221013002 has 32 divisors (see below), whose sum is σ = 2673549504. Its totient is φ = 368681600.

The previous prime is 1221012977. The next prime is 1221013007. The reversal of 1221013002 is 2003101221.

It is not an unprimeable number, because it can be changed into a prime (1221013007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14373 + ... + 51464.

It is an arithmetic number, because the mean of its divisors is an integer number (83548422).

Almost surely, 2^1221013002 is an apocalyptic number.

1221013002 is an abundant number, since it is smaller than the sum of its proper divisors (1452536502).

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

1221013002 is a wasteful number, since it uses less digits than its factorization.

1221013002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66134.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1221013002 is about 34942.9964656725. The cubic root of 1221013002 is about 1068.8253922534.

Adding to 1221013002 its reverse (2003101221), we get a palindrome (3224114223).

The spelling of 1221013002 in words is "one billion, two hundred twenty-one million, thirteen thousand, two".