1220991320033 has 4 divisors (see below), whose sum is σ = 1220995772100. Its totient is φ = 1220986867968.

The previous prime is 1220991319987. The next prime is 1220991320041. The reversal of 1220991320033 is 3300231990221.

It is a happy number.

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 329283164224 + 891708155809 = 573832^2 + 944303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220991320033 - 2¹² = 1220991315937 is a prime.

It is a super-3 number, since 3×1220991320033³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220991319975 and 1220991320002.

It is not an unprimeable number, because it can be changed into a prime (1220991320063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785608 + ... + 2372841.

It is an arithmetic number, because the mean of its divisors is an integer number (305248943025).

Almost surely, 2^{1220991320033} is an apocalyptic number.

It is an amenable number.

1220991320033 is a deficient number, since it is larger than the sum of its proper divisors (4452067).

1220991320033 is an equidigital number, since it uses as much as digits as its factorization.

1220991320033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452066.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 1220991320033 in words is "one trillion, two hundred twenty billion, nine hundred ninety-one million, three hundred twenty thousand, thirty-three".