1220334033421 has 8 divisors (see below), whose sum is σ = 1225686724920. Its totient is φ = 1214986027008.

The previous prime is 1220334033403. The next prime is 1220334033433. The reversal of 1220334033421 is 1243304330221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 959202813321 + 261131220100 = 979389^2 + 511010^2 .

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 1220334033421 - 2⁷ = 1220334033293 is a prime.

It is a super-3 number, since 3×1220334033421³ (a number of 37 digits) contains 333 as substring.

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 1220334033421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220334033481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648676 + ... + 1691581.

It is an arithmetic number, because the mean of its divisors is an integer number (153210840615).

Almost surely, 2^{1220334033421} is an apocalyptic number.

It is an amenable number.

1220334033421 is a deficient number, since it is larger than the sum of its proper divisors (5352691499).

1220334033421 is a wasteful number, since it uses less digits than its factorization.

1220334033421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342543.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 1220334033421 its reverse (1243304330221), we get a palindrome (2463638363642).

The spelling of 1220334033421 in words is "one trillion, two hundred twenty billion, three hundred thirty-four million, thirty-three thousand, four hundred twenty-one".