1221043433322 has 16 divisors (see below), whose sum is σ = 2442995075520. Its totient is φ = 406863109632.

The previous prime is 1221043433317. The next prime is 1221043433327. The reversal of 1221043433322 is 2233343401221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1221043433317) and next prime (1221043433327).

It is a super-3 number, since 3×1221043433322³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221043433322.

It is not an unprimeable number, because it can be changed into a prime (1221043433327) 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, 37824558 + ... + 37856825.

It is an arithmetic number, because the mean of its divisors is an integer number (152687192220).

Almost surely, 2^{1221043433322} is an apocalyptic number.

1221043433322 is an abundant number, since it is smaller than the sum of its proper divisors (1221951642198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221043433322 is a wasteful number, since it uses less digits than its factorization.

1221043433322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75684077.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 1221043433322 its reverse (2233343401221), we get a palindrome (3454386834543).

The spelling of 1221043433322 in words is "one trillion, two hundred twenty-one billion, forty-three million, four hundred thirty-three thousand, three hundred twenty-two".