23121110323211 has 4 divisors (see below), whose sum is σ = 23122849158072. Its totient is φ = 23119371488352.

The previous prime is 23121110323189. The next prime is 23121110323247. The reversal of 23121110323211 is 11232301112132.

It is a happy number.

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 23121110323211 - 2²² = 23121106128907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121110325211) 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, 869397485 + ... + 869424078.

It is an arithmetic number, because the mean of its divisors is an integer number (5780712289518).

Almost surely, 2^{23121110323211} is an apocalyptic number.

23121110323211 is a deficient number, since it is larger than the sum of its proper divisors (1738834861).

23121110323211 is a wasteful number, since it uses less digits than its factorization.

23121110323211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738834860.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 23121110323211 its reverse (11232301112132), we get a palindrome (34353411435343).

The spelling of 23121110323211 in words is "twenty-three trillion, one hundred twenty-one billion, one hundred ten million, three hundred twenty-three thousand, two hundred eleven".