1333212221 has 16 divisors (see below), whose sum is σ = 1471737600. Its totient is φ = 1197624000.

The previous prime is 1333212187. The next prime is 1333212247. The reversal of 1333212221 is 1222123331.

It is a cyclic number.

It is not a de Polignac number, because 1333212221 - 2¹⁰ = 1333211197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1333212193 and 1333212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1333212271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797975 + ... + 799643.

It is an arithmetic number, because the mean of its divisors is an integer number (91983600).

Almost surely, 2^1333212221 is an apocalyptic number.

1333212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1333212221 is a deficient number, since it is larger than the sum of its proper divisors (138525379).

1333212221 is a wasteful number, since it uses less digits than its factorization.

1333212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500.

The product of its digits is 432, while the sum is 20.

The square root of 1333212221 is about 36513.1787304255. The cubic root of 1333212221 is about 1100.6090899463.

Adding to 1333212221 its reverse (1222123331), we get a palindrome (2555335552).

The spelling of 1333212221 in words is "one billion, three hundred thirty-three million, two hundred twelve thousand, two hundred twenty-one".