12100011021 has 48 divisors (see below), whose sum is σ = 20547072000. Its totient is φ = 6718266144.

The previous prime is 12100011019. The next prime is 12100011023. The reversal of 12100011021 is 12011000121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12100011019) and next prime (12100011023).

It is not a de Polignac number, because 12100011021 - 2¹ = 12100011019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12100010994 and 12100011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100011023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396880 + ... + 426278.

It is an arithmetic number, because the mean of its divisors is an integer number (428064000).

Almost surely, 2^12100011021 is an apocalyptic number.

It is an amenable number.

12100011021 is a deficient number, since it is larger than the sum of its proper divisors (8447060979).

12100011021 is a wasteful number, since it uses less digits than its factorization.

12100011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29598 (or 29595 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12100011021 its reverse (12011000121), we get a palindrome (24111011142).

The spelling of 12100011021 in words is "twelve billion, one hundred million, eleven thousand, twenty-one".