1221002032002 has 16 divisors (see below), whose sum is σ = 2442775180032. Its totient is φ = 406872158000.

The previous prime is 1221002031923. The next prime is 1221002032037. The reversal of 1221002032002 is 2002302001221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32109249 + ... + 32147252.

It is an arithmetic number, because the mean of its divisors is an integer number (152673448752).

Almost surely, 2^{1221002032002} is an apocalyptic number.

1221002032002 is an abundant number, since it is smaller than the sum of its proper divisors (1221773148030).

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

1221002032002 is a wasteful number, since it uses less digits than its factorization.

1221002032002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64259673.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 1221002032002 its reverse (2002302001221), we get a palindrome (3223304033223).

The spelling of 1221002032002 in words is "one trillion, two hundred twenty-one billion, two million, thirty-two thousand, two".