1221212220333 has 8 divisors (see below), whose sum is σ = 1860894811968. Its totient is φ = 697835554464.

The previous prime is 1221212220313. The next prime is 1221212220343. The reversal of 1221212220333 is 3330222121221.

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

It is not a de Polignac number, because 1221212220333 - 2⁵ = 1221212220301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221212220313) 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, 29076481416 + ... + 29076481457.

It is an arithmetic number, because the mean of its divisors is an integer number (232611851496).

Almost surely, 2^{1221212220333} is an apocalyptic number.

It is an amenable number.

1221212220333 is a deficient number, since it is larger than the sum of its proper divisors (639682591635).

1221212220333 is an equidigital number, since it uses as much as digits as its factorization.

1221212220333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58152962883.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1221212220333 its reverse (3330222121221), we get a palindrome (4551434341554).

The spelling of 1221212220333 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, three hundred thirty-three".