12023020221 has 16 divisors (see below), whose sum is σ = 16308902400. Its totient is φ = 7876815408.

The previous prime is 12023020201. The next prime is 12023020231. The reversal of 12023020221 is 12202032021.

It is a happy number.

It is not a de Polignac number, because 12023020221 - 2⁶ = 12023020157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12023020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023020201) 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, 12840 + ... + 155598.

It is an arithmetic number, because the mean of its divisors is an integer number (1019306400).

Almost surely, 2^12023020221 is an apocalyptic number.

It is an amenable number.

12023020221 is a deficient number, since it is larger than the sum of its proper divisors (4285882179).

12023020221 is a wasteful number, since it uses less digits than its factorization.

12023020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143248.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12023020221 its reverse (12202032021), we get a palindrome (24225052242).

The spelling of 12023020221 in words is "twelve billion, twenty-three million, twenty thousand, two hundred twenty-one".