12002101221 has 16 divisors (see below), whose sum is σ = 17501594688. Its totient is φ = 7255670400.

The previous prime is 12002101159. The next prime is 12002101253. The reversal of 12002101221 is 12210120021.

It is not a de Polignac number, because 12002101221 - 2⁶ = 12002101157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002101197 and 12002101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002101271) 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, 444960 + ... + 471161.

It is an arithmetic number, because the mean of its divisors is an integer number (1093849668).

Almost surely, 2^12002101221 is an apocalyptic number.

12002101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12002101221 is a deficient number, since it is larger than the sum of its proper divisors (5499493467).

12002101221 is a wasteful number, since it uses less digits than its factorization.

12002101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916532.

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

Adding to 12002101221 its reverse (12210120021), we get a palindrome (24212221242).

The spelling of 12002101221 in words is "twelve billion, two million, one hundred one thousand, two hundred twenty-one".