1212321011 has 8 divisors (see below), whose sum is σ = 1392139200. Its totient is φ = 1044104040.

The previous prime is 1212320987. The next prime is 1212321013. The reversal of 1212321011 is 1101232121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212321011 - 2²² = 1208126707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212321013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2900081 + ... + 2900498.

It is an arithmetic number, because the mean of its divisors is an integer number (174017400).

Almost surely, 2^1212321011 is an apocalyptic number.

1212321011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212321011 is a deficient number, since it is larger than the sum of its proper divisors (179818189).

1212321011 is a wasteful number, since it uses less digits than its factorization.

1212321011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800609.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1212321011 is about 34818.4004658456. The cubic root of 1212321011 is about 1066.2831444228.

Adding to 1212321011 its reverse (1101232121), we get a palindrome (2313553132).

It can be divided in two parts, 1212 and 321011, that added together give a palindrome (322223).

The spelling of 1212321011 in words is "one billion, two hundred twelve million, three hundred twenty-one thousand, eleven".