1221132333 has 16 divisors (see below), whose sum is σ = 1671561216. Its totient is φ = 792578160.

The previous prime is 1221132329. The next prime is 1221132347. The reversal of 1221132333 is 3332311221.

It is not a de Polignac number, because 1221132333 - 2² = 1221132329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221132313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4260 + ... + 49602.

It is an arithmetic number, because the mean of its divisors is an integer number (104472576).

Almost surely, 2^1221132333 is an apocalyptic number.

It is an amenable number.

1221132333 is a deficient number, since it is larger than the sum of its proper divisors (450428883).

1221132333 is a wasteful number, since it uses less digits than its factorization.

1221132333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45584.

The product of its digits is 648, while the sum is 21.

The square root of 1221132333 is about 34944.7039335004. The cubic root of 1221132333 is about 1068.8602102960.

Adding to 1221132333 its reverse (3332311221), we get a palindrome (4553443554).

It can be divided in two parts, 12211 and 32333, that added together give a palindrome (44544).

The spelling of 1221132333 in words is "one billion, two hundred twenty-one million, one hundred thirty-two thousand, three hundred thirty-three".