1221332430002 has 4 divisors (see below), whose sum is σ = 1831998645006. Its totient is φ = 610666215000.

The previous prime is 1221332429969. The next prime is 1221332430007. The reversal of 1221332430002 is 2000342331221.

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., 1191741205561 + 29591224441 = 1091669^2 + 172021^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1221332430002.

It is not an unprimeable number, because it can be changed into a prime (1221332430007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305333107499 + ... + 305333107502.

Almost surely, 2^{1221332430002} is an apocalyptic number.

1221332430002 is a deficient number, since it is larger than the sum of its proper divisors (610666215004).

1221332430002 is an equidigital number, since it uses as much as digits as its factorization.

1221332430002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610666215003.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 1221332430002 its reverse (2000342331221), we get a palindrome (3221674761223).

The spelling of 1221332430002 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, four hundred thirty thousand, two".