23122121211 has 12 divisors (see below), whose sum is σ = 38169850992. Its totient is φ = 13212640656.

The previous prime is 23122121177. The next prime is 23122121219. The reversal of 23122121211 is 11212122132.

23122121211 is a `hidden beast` number, since 231 + 221 + 2 + 1 + 211 = 666.

It is not a de Polignac number, because 23122121211 - 2⁶ = 23122121147 is a prime.

It is a super-4 number, since 4×23122121211⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (23122121219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183508836 + ... + 183508961.

It is an arithmetic number, because the mean of its divisors is an integer number (3180820916).

Almost surely, 2^23122121211 is an apocalyptic number.

23122121211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23122121211 is a deficient number, since it is larger than the sum of its proper divisors (15047729781).

23122121211 is a wasteful number, since it uses less digits than its factorization.

23122121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367017810 (or 367017807 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 23122121211 its reverse (11212122132), we get a palindrome (34334243343).

The spelling of 23122121211 in words is "twenty-three billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".