1212133321 has 8 divisors (see below), whose sum is σ = 1417511744. Its totient is φ = 1014809040.

The previous prime is 1212133309. The next prime is 1212133331. The reversal of 1212133321 is 1233312121.

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

It is not a de Polignac number, because 1212133321 - 2⁹ = 1212132809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212133331) 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, 2013210 + ... + 2013811.

It is an arithmetic number, because the mean of its divisors is an integer number (177188968).

Almost surely, 2^1212133321 is an apocalyptic number.

It is an amenable number.

1212133321 is a deficient number, since it is larger than the sum of its proper divisors (205378423).

1212133321 is an equidigital number, since it uses as much as digits as its factorization.

1212133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027071.

The product of its digits is 216, while the sum is 19.

The square root of 1212133321 is about 34815.7050912372. The cubic root of 1212133321 is about 1066.2281147152.

Adding to 1212133321 its reverse (1233312121), we get a palindrome (2445445442).

The spelling of 1212133321 in words is "one billion, two hundred twelve million, one hundred thirty-three thousand, three hundred twenty-one".