12101112021 has 16 divisors (see below), whose sum is σ = 16215401664. Its totient is φ = 8027207424.

The previous prime is 12101111963. The next prime is 12101112041. The reversal of 12101112021 is 12021110121.

It is not a de Polignac number, because 12101112021 - 2³⁰ = 11027370197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12101111988 and 12101112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101112041) 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, 535075 + ... + 557231.

It is an arithmetic number, because the mean of its divisors is an integer number (1013462604).

Almost surely, 2^12101112021 is an apocalyptic number.

It is an amenable number.

12101112021 is a deficient number, since it is larger than the sum of its proper divisors (4114289643).

12101112021 is a wasteful number, since it uses less digits than its factorization.

12101112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23060.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12101112021 its reverse (12021110121), we get a palindrome (24122222142).

The spelling of 12101112021 in words is "twelve billion, one hundred one million, one hundred twelve thousand, twenty-one".