12012100221021 has 16 divisors (see below), whose sum is σ = 16598159971200. Its totient is φ = 7718045171648.

The previous prime is 12012100221013. The next prime is 12012100221083. The reversal of 12012100221021 is 12012200121021.

It is a cyclic number.

It is not a de Polignac number, because 12012100221021 - 2³ = 12012100221013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012100221001) 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, 123892401 + ... + 123989318.

It is an arithmetic number, because the mean of its divisors is an integer number (1037384998200).

Almost surely, 2^{12012100221021} is an apocalyptic number.

It is an amenable number.

12012100221021 is a deficient number, since it is larger than the sum of its proper divisors (4586059750179).

12012100221021 is a wasteful number, since it uses less digits than its factorization.

12012100221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247882308.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12012100221021 its reverse (12012200121021), we get a palindrome (24024300342042).

The spelling of 12012100221021 in words is "twelve trillion, twelve billion, one hundred million, two hundred twenty-one thousand, twenty-one".