12121002311 has 16 divisors (see below), whose sum is σ = 13433372160. Its totient is φ = 10844608320.

The previous prime is 12121002307. The next prime is 12121002319. The reversal of 12121002311 is 11320012121.

It is a cyclic number.

It is not a de Polignac number, because 12121002311 - 2² = 12121002307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121002319) 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, 249716 + ... + 294278.

It is an arithmetic number, because the mean of its divisors is an integer number (839585760).

Almost surely, 2^12121002311 is an apocalyptic number.

12121002311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121002311 is a deficient number, since it is larger than the sum of its proper divisors (1312369849).

12121002311 is a wasteful number, since it uses less digits than its factorization.

12121002311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44966.

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

Adding to 12121002311 its reverse (11320012121), we get a palindrome (23441014432).

The spelling of 12121002311 in words is "twelve billion, one hundred twenty-one million, two thousand, three hundred eleven".