23020012121 has 4 divisors (see below), whose sum is σ = 23034392244. Its totient is φ = 23005632000.

The previous prime is 23020012087. The next prime is 23020012129. The reversal of 23020012121 is 12121002032.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13501278025 + 9518734096 = 116195^2 + 97564^2 .

It is a cyclic number.

It is not a de Polignac number, because 23020012121 - 2¹⁰ = 23020011097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23020012096 and 23020012105.

It is not an unprimeable number, because it can be changed into a prime (23020012129) 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, 7187660 + ... + 7190861.

It is an arithmetic number, because the mean of its divisors is an integer number (5758598061).

Almost surely, 2^23020012121 is an apocalyptic number.

It is an amenable number.

23020012121 is a deficient number, since it is larger than the sum of its proper divisors (14380123).

23020012121 is a wasteful number, since it uses less digits than its factorization.

23020012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14380122.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 23020012121 its reverse (12121002032), we get a palindrome (35141014153).

The spelling of 23020012121 in words is "twenty-three billion, twenty million, twelve thousand, one hundred twenty-one".