23121322211 has 4 divisors (see below), whose sum is σ = 24899885472. Its totient is φ = 21342758952.

The previous prime is 23121322199. The next prime is 23121322241. The reversal of 23121322211 is 11222312132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23121322211 - 2²² = 23117127907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121322241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889281611 + ... + 889281636.

It is an arithmetic number, because the mean of its divisors is an integer number (6224971368).

Almost surely, 2^23121322211 is an apocalyptic number.

23121322211 is a deficient number, since it is larger than the sum of its proper divisors (1778563261).

23121322211 is a wasteful number, since it uses less digits than its factorization.

23121322211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778563260.

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

Adding to 23121322211 its reverse (11222312132), we get a palindrome (34343634343).

The spelling of 23121322211 in words is "twenty-three billion, one hundred twenty-one million, three hundred twenty-two thousand, two hundred eleven".