1221312233033 has 24 divisors (see below), whose sum is σ = 1294445553408. Its totient is φ = 1152092269152.

The previous prime is 1221312232937. The next prime is 1221312233059. The reversal of 1221312233033 is 3303322131221.

It is a de Polignac number, because none of the positive numbers 2^k-1221312233033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1221312232993 and 1221312233011.

It is not an unprimeable number, because it can be changed into a prime (1221312233093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12574091 + ... + 12670847.

It is an arithmetic number, because the mean of its divisors is an integer number (53935231392).

Almost surely, 2^{1221312233033} is an apocalyptic number.

It is an amenable number.

1221312233033 is a deficient number, since it is larger than the sum of its proper divisors (73133320375).

1221312233033 is a wasteful number, since it uses less digits than its factorization.

1221312233033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97133 (or 97110 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1221312233033 its reverse (3303322131221), we get a palindrome (4524634364254).

The spelling of 1221312233033 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, two hundred thirty-three thousand, thirty-three".