12102012021 has 8 divisors (see below), whose sum is σ = 17602926624. Its totient is φ = 7334552720.

The previous prime is 12102011989. The next prime is 12102012023. The reversal of 12102012021 is 12021020121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12102012021 - 2⁵ = 12102011989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102011988 and 12102012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102012023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183363786 + ... + 183363851.

It is an arithmetic number, because the mean of its divisors is an integer number (2200365828).

Almost surely, 2^12102012021 is an apocalyptic number.

12102012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12102012021 is a deficient number, since it is larger than the sum of its proper divisors (5500914603).

12102012021 is a wasteful number, since it uses less digits than its factorization.

12102012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366727651.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12102012021 its reverse (12021020121), we get a palindrome (24123032142).

The spelling of 12102012021 in words is "twelve billion, one hundred two million, twelve thousand, twenty-one".