1212002000221 has 12 divisors (see below), whose sum is σ = 1279241284032. Its totient is φ = 1148129517384.

The previous prime is 1212002000207. The next prime is 1212002000323. The reversal of 1212002000221 is 1220002002121.

It is a happy number.

It is not a de Polignac number, because 1212002000221 - 2³⁹ = 662246186333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002009221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5209836 + ... + 5437498.

It is an arithmetic number, because the mean of its divisors is an integer number (106603440336).

Almost surely, 2^{1212002000221} is an apocalyptic number.

It is an amenable number.

1212002000221 is a deficient number, since it is larger than the sum of its proper divisors (67239283811).

1212002000221 is a wasteful number, since it uses less digits than its factorization.

1212002000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242448 (or 242429 counting only the distinct ones).

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

Adding to 1212002000221 its reverse (1220002002121), we get a palindrome (2432004002342).

The spelling of 1212002000221 in words is "one trillion, two hundred twelve billion, two million, two hundred twenty-one", and thus it is an aban number.