1221202212002 has 16 divisors (see below), whose sum is σ = 1891074619392. Its totient is φ = 590847773760.

The previous prime is 1221202211941. The next prime is 1221202212011. The reversal of 1221202212002 is 2002122021221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284978 + ... + 1588589.

It is an arithmetic number, because the mean of its divisors is an integer number (118192163712).

Almost surely, 2^{1221202212002} is an apocalyptic number.

1221202212002 is a deficient number, since it is larger than the sum of its proper divisors (669872407390).

1221202212002 is a wasteful number, since it uses less digits than its factorization.

1221202212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884113.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1221202212002 its reverse (2002122021221), we get a palindrome (3223324233223).

The spelling of 1221202212002 in words is "one trillion, two hundred twenty-one billion, two hundred two million, two hundred twelve thousand, two".