12000201021 has 12 divisors (see below), whose sum is σ = 17341199772. Its totient is φ = 7996637376.

The previous prime is 12000201019. The next prime is 12000201023. The reversal of 12000201021 is 12010200021.

It is an interprime number because it is at equal distance from previous prime (12000201019) and next prime (12000201023).

It can be written as a sum of positive squares in 2 ways, for example, as 2228878521 + 9771322500 = 47211^2 + 98850^2 .

It is not a de Polignac number, because 12000201021 - 2¹ = 12000201019 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 12000200994 and 12000201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000201023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269566 + ... + 310911.

It is an arithmetic number, because the mean of its divisors is an integer number (1445099981).

Almost surely, 2^12000201021 is an apocalyptic number.

It is an amenable number.

12000201021 is a deficient number, since it is larger than the sum of its proper divisors (5340998751).

12000201021 is a wasteful number, since it uses less digits than its factorization.

12000201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582780 (or 582777 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12000201021 its reverse (12010200021), we get a palindrome (24010401042).

The spelling of 12000201021 in words is "twelve billion, two hundred one thousand, twenty-one".