23211123221 has 16 divisors (see below), whose sum is σ = 27597568320. Its totient is φ = 19243182720.

The previous prime is 23211123217. The next prime is 23211123283. The reversal of 23211123221 is 12232111232.

It is a cyclic number.

It is not a de Polignac number, because 23211123221 - 2² = 23211123217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23211123193 and 23211123202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211123521) 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, 965936 + ... + 989673.

It is an arithmetic number, because the mean of its divisors is an integer number (1724848020).

Almost surely, 2^23211123221 is an apocalyptic number.

It is an amenable number.

23211123221 is a deficient number, since it is larger than the sum of its proper divisors (4386445099).

23211123221 is a wasteful number, since it uses less digits than its factorization.

23211123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955716.

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

Adding to 23211123221 its reverse (12232111232), we get a palindrome (35443234453).

The spelling of 23211123221 in words is "twenty-three billion, two hundred eleven million, one hundred twenty-three thousand, two hundred twenty-one".