23121201111 has 8 divisors (see below), whose sum is σ = 30829319664. Its totient is φ = 15413608320.

The previous prime is 23121200969. The next prime is 23121201121. The reversal of 23121201111 is 11110212132.

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

It is not a de Polignac number, because 23121201111 - 2¹⁴ = 23121184727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121201121) 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 7 ways as a sum of consecutive naturals, for example, 13780 + ... + 215481.

It is an arithmetic number, because the mean of its divisors is an integer number (3853664958).

Almost surely, 2^23121201111 is an apocalyptic number.

23121201111 is a deficient number, since it is larger than the sum of its proper divisors (7708118553).

23121201111 is a wasteful number, since it uses less digits than its factorization.

23121201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262881.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 23121201111 its reverse (11110212132), we get a palindrome (34231413243).

The spelling of 23121201111 in words is "twenty-three billion, one hundred twenty-one million, two hundred one thousand, one hundred eleven".