1221012020233 has 8 divisors (see below), whose sum is σ = 1241733764160. Its totient is φ = 1200291163920.

The previous prime is 1221012020231. The next prime is 1221012020237. The reversal of 1221012020233 is 3320202101221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221012020233 - 2¹ = 1221012020231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221012020233.

It is not an unprimeable number, because it can be changed into a prime (1221012020231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2929068 + ... + 3319858.

It is an arithmetic number, because the mean of its divisors is an integer number (155216720520).

Almost surely, 2^{1221012020233} is an apocalyptic number.

It is an amenable number.

1221012020233 is a deficient number, since it is larger than the sum of its proper divisors (20721743927).

1221012020233 is an equidigital number, since it uses as much as digits as its factorization.

1221012020233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443807.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1221012020233 its reverse (3320202101221), we get a palindrome (4541214121454).

The spelling of 1221012020233 in words is "one trillion, two hundred twenty-one billion, twelve million, twenty thousand, two hundred thirty-three".