23201212111 has 32 divisors (see below), whose sum is σ = 30675760128. Its totient is φ = 16988720640.

The previous prime is 23201212109. The next prime is 23201212123. The reversal of 23201212111 is 11121210232.

It is a cyclic number.

It is not a de Polignac number, because 23201212111 - 2¹ = 23201212109 is a prime.

It is a super-2 number, since 2×23201212111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201210111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 841206 + ... + 868348.

It is an arithmetic number, because the mean of its divisors is an integer number (958617504).

Almost surely, 2^23201212111 is an apocalyptic number.

23201212111 is a deficient number, since it is larger than the sum of its proper divisors (7474548017).

23201212111 is a wasteful number, since it uses less digits than its factorization.

23201212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27831.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 23201212111 its reverse (11121210232), we get a palindrome (34322422343).

It can be divided in two parts, 2320121 and 2111, that added together give a palindrome (2322232).

The spelling of 23201212111 in words is "twenty-three billion, two hundred one million, two hundred twelve thousand, one hundred eleven".