1221002233 has 8 divisors (see below), whose sum is σ = 1332272736. Its totient is φ = 1109776800.

The previous prime is 1221002213. The next prime is 1221002261. The reversal of 1221002233 is 3322001221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221002233 - 2⁵ = 1221002201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221002213) 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, 72493 + ... + 87733.

It is an arithmetic number, because the mean of its divisors is an integer number (166534092).

Almost surely, 2^1221002233 is an apocalyptic number.

It is an amenable number.

1221002233 is a deficient number, since it is larger than the sum of its proper divisors (111270503).

1221002233 is a wasteful number, since it uses less digits than its factorization.

1221002233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22535.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1221002233 is about 34942.8423715072. The cubic root of 1221002233 is about 1068.8222499952.

Adding to 1221002233 its reverse (3322001221), we get a palindrome (4543003454).

The spelling of 1221002233 in words is "one billion, two hundred twenty-one million, two thousand, two hundred thirty-three".