1212021229985 has 8 divisors (see below), whose sum is σ = 1457880170856. Its totient is φ = 967313854080.

The previous prime is 1212021229927. The next prime is 1212021230039. The reversal of 1212021229985 is 5899221202121.

It can be written as a sum of positive squares in 4 ways, for example, as 1026625681 + 1210994604304 = 32041^2 + 1100452^2 .

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

It is not a de Polignac number, because 1212021229985 - 2⁸ = 1212021229729 is a prime.

It is a Duffinian number.

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, 287888924 + ... + 287893133.

It is an arithmetic number, because the mean of its divisors is an integer number (182235021357).

Almost surely, 2^{1212021229985} is an apocalyptic number.

It is an amenable number.

1212021229985 is a deficient number, since it is larger than the sum of its proper divisors (245858940871).

1212021229985 is an equidigital number, since it uses as much as digits as its factorization.

1212021229985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575782483.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 1212021229985 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred twenty-nine thousand, nine hundred eighty-five".