23031121 has 2 divisors, whose sum is σ = 23031122. Its totient is φ = 23031120.

The previous prime is 23031103. The next prime is 23031157. The reversal of 23031121 is 12113032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15681600 + 7349521 = 3960^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 23031121 - 2¹¹ = 23029073 is a prime.

It is not a weakly prime, because it can be changed into another prime (23038121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515560 + 11515561.

It is an arithmetic number, because the mean of its divisors is an integer number (11515561).

Almost surely, 2^23031121 is an apocalyptic number.

It is an amenable number.

23031121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031121 is an equidigital number, since it uses as much as digits as its factorization.

23031121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 23031121 is about 4799.0750150420. The cubic root of 23031121 is about 284.5149068205.

Adding to 23031121 its reverse (12113032), we get a palindrome (35144153).

The spelling of 23031121 in words is "twenty-three million, thirty-one thousand, one hundred twenty-one".