23020121011 has 4 divisors (see below), whose sum is σ = 23038064712. Its totient is φ = 23002177312.

The previous prime is 23020120997. The next prime is 23020121017. The reversal of 23020121011 is 11012102032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23020121011 - 2¹¹ = 23020118963 is a prime.

It is a super-2 number, since 2×23020121011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23020120982 and 23020121000.

It is not an unprimeable number, because it can be changed into a prime (23020121017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8969926 + ... + 8972491.

It is an arithmetic number, because the mean of its divisors is an integer number (5759516178).

Almost surely, 2^23020121011 is an apocalyptic number.

23020121011 is a deficient number, since it is larger than the sum of its proper divisors (17943701).

23020121011 is a wasteful number, since it uses less digits than its factorization.

23020121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17943700.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 23020121011 its reverse (11012102032), we get a palindrome (34032223043).

The spelling of 23020121011 in words is "twenty-three billion, twenty million, one hundred twenty-one thousand, eleven".