23121101 has 2 divisors, whose sum is σ = 23121102. Its totient is φ = 23121100.

The previous prime is 23121073. The next prime is 23121103. The reversal of 23121101 is 10112132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18498601 + 4622500 = 4301^2 + 2150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23121101 is a prime.

It is a super-2 number, since 2×23121101² = 1069170622904402, which contains 22 as substring.

Together with 23121103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560550 + 11560551.

It is an arithmetic number, because the mean of its divisors is an integer number (11560551).

Almost surely, 2^23121101 is an apocalyptic number.

It is an amenable number.

23121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121101 is an equidigital number, since it uses as much as digits as its factorization.

23121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 23121101 is about 4808.4405996123. The cubic root of 23121101 is about 284.8849479179.

Adding to 23121101 its reverse (10112132), we get a palindrome (33233233).

The spelling of 23121101 in words is "twenty-three million, one hundred twenty-one thousand, one hundred one".