12101123021 has 16 divisors (see below), whose sum is σ = 13147774080. Its totient is φ = 11071287360.

The previous prime is 12101123003. The next prime is 12101123051. The reversal of 12101123021 is 12032110121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101123021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101122987 and 12101123005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101123051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1134911 + ... + 1145523.

It is an arithmetic number, because the mean of its divisors is an integer number (821735880).

Almost surely, 2^12101123021 is an apocalyptic number.

It is an amenable number.

12101123021 is a deficient number, since it is larger than the sum of its proper divisors (1046651059).

12101123021 is a wasteful number, since it uses less digits than its factorization.

12101123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11396.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12101123021 its reverse (12032110121), we get a palindrome (24133233142).

The spelling of 12101123021 in words is "twelve billion, one hundred one million, one hundred twenty-three thousand, twenty-one".