1220421211333 has 4 divisors (see below), whose sum is σ = 1220423542380. Its totient is φ = 1220418880288.

The previous prime is 1220421211319. The next prime is 1220421211367. The reversal of 1220421211333 is 3331121240221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 706436888004 + 513984323329 = 840498^2 + 716927^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220421211333 - 2³³ = 1211831276741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220421211298 and 1220421211307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220421211033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25491 + ... + 1562527.

It is an arithmetic number, because the mean of its divisors is an integer number (305105885595).

Almost surely, 2^{1220421211333} is an apocalyptic number.

It is an amenable number.

1220421211333 is a deficient number, since it is larger than the sum of its proper divisors (2331047).

1220421211333 is an equidigital number, since it uses as much as digits as its factorization.

1220421211333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331046.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1220421211333 its reverse (3331121240221), we get a palindrome (4551542451554).

The spelling of 1220421211333 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, two hundred eleven thousand, three hundred thirty-three".