23121356 has 12 divisors (see below), whose sum is σ = 41226192. Its totient is φ = 11342448.

The previous prime is 23121349. The next prime is 23121359. The reversal of 23121356 is 65312132.

It is not an unprimeable number, because it can be changed into a prime (23121359) 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, 54320 + ... + 54743.

It is an arithmetic number, because the mean of its divisors is an integer number (3435516).

Almost surely, 2^23121356 is an apocalyptic number.

It is an amenable number.

23121356 is a deficient number, since it is larger than the sum of its proper divisors (18104836).

23121356 is a wasteful number, since it uses less digits than its factorization.

23121356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109120 (or 109118 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 23121356 is about 4808.4671154121. The cubic root of 23121356 is about 284.8859952353.

Adding to 23121356 its reverse (65312132), we get a palindrome (88433488).

The spelling of 23121356 in words is "twenty-three million, one hundred twenty-one thousand, three hundred fifty-six".