1221012012002 has 8 divisors (see below), whose sum is σ = 1834736856300. Its totient is φ = 609433059904.

The previous prime is 1221012011993. The next prime is 1221012012047. The reversal of 1221012012002 is 2002102101221.

It can be written as a sum of positive squares in 2 ways, for example, as 1217533489561 + 3478522441 = 1103419^2 + 58979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536471627 + ... + 536473902.

Almost surely, 2^{1221012012002} is an apocalyptic number.

1221012012002 is a deficient number, since it is larger than the sum of its proper divisors (613724844298).

1221012012002 is a wasteful number, since it uses less digits than its factorization.

1221012012002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072946100.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221012012002 its reverse (2002102101221), we get a palindrome (3223114113223).

The spelling of 1221012012002 in words is "one trillion, two hundred twenty-one billion, twelve million, twelve thousand, two".