1212312000221 has 12 divisors (see below), whose sum is σ = 1410451261632. Its totient is φ = 1038969266328.

The previous prime is 1212312000209. The next prime is 1212312000241. The reversal of 1212312000221 is 1220002132121.

It is not a de Polignac number, because 1212312000221 - 2³⁰ = 1211238258397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212312000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212312000241) 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, 1517075 + ... + 2173968.

It is an arithmetic number, because the mean of its divisors is an integer number (117537605136).

Almost surely, 2^{1212312000221} is an apocalyptic number.

It is an amenable number.

1212312000221 is a deficient number, since it is larger than the sum of its proper divisors (198139261411).

1212312000221 is an equidigital number, since it uses as much as digits as its factorization.

1212312000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697760 (or 3697753 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1212312000221 its reverse (1220002132121), we get a palindrome (2432314132342).

The spelling of 1212312000221 in words is "one trillion, two hundred twelve billion, three hundred twelve million, two hundred twenty-one", and thus it is an aban number.