23121023311 has 4 divisors (see below), whose sum is σ = 23126014152. Its totient is φ = 23116032472.

The previous prime is 23121023287. The next prime is 23121023327. The reversal of 23121023311 is 11332012132.

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 23121023311 - 2⁵ = 23121023279 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 (23121023371) 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, 2488465 + ... + 2497738.

It is an arithmetic number, because the mean of its divisors is an integer number (5781503538).

Almost surely, 2^23121023311 is an apocalyptic number.

23121023311 is a deficient number, since it is larger than the sum of its proper divisors (4990841).

23121023311 is an equidigital number, since it uses as much as digits as its factorization.

23121023311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990840.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23121023311 its reverse (11332012132), we get a palindrome (34453035443).

The spelling of 23121023311 in words is "twenty-three billion, one hundred twenty-one million, twenty-three thousand, three hundred eleven".