1212221000002 has 16 divisors (see below), whose sum is σ = 1898289775800. Its totient is φ = 579841234560.

The previous prime is 1212220999993. The next prime is 1212221000017. The reversal of 1212221000002 is 2000001222121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1016767705801 + 195453294201 = 1008349^2 + 442101^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95866899 + ... + 95879542.

Almost surely, 2^{1212221000002} is an apocalyptic number.

1212221000002 is a deficient number, since it is larger than the sum of its proper divisors (686068775798).

1212221000002 is a wasteful number, since it uses less digits than its factorization.

1212221000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191746581.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1212221000002 its reverse (2000001222121), we get a palindrome (3212222222123).

The spelling of 1212221000002 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two", and thus it is an aban number.