21233014121 has 32 divisors (see below), whose sum is σ = 25487308800. Its totient is φ = 17460938880.

The previous prime is 21233014069. The next prime is 21233014123. The reversal of 21233014121 is 12141033212.

It is a de Polignac number, because none of the positive numbers 2^k-21233014121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21233014093 and 21233014102.

It is not an unprimeable number, because it can be changed into a prime (21233014123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2962340 + ... + 2969498.

It is an arithmetic number, because the mean of its divisors is an integer number (796478400).

Almost surely, 2^21233014121 is an apocalyptic number.

It is an amenable number.

21233014121 is a deficient number, since it is larger than the sum of its proper divisors (4254294679).

21233014121 is a wasteful number, since it uses less digits than its factorization.

21233014121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7829.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21233014121 its reverse (12141033212), we get a palindrome (33374047333).

The spelling of 21233014121 in words is "twenty-one billion, two hundred thirty-three million, fourteen thousand, one hundred twenty-one".