12021022221101 has 4 divisors (see below), whose sum is σ = 12021871837500. Its totient is φ = 12020172604704.

The previous prime is 12021022221071. The next prime is 12021022221107. The reversal of 12021022221101 is 10112222012021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11255528465476 + 765493755625 = 3354926^2 + 874925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021022221101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021022221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021022221107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424786976 + ... + 424815273.

It is an arithmetic number, because the mean of its divisors is an integer number (3005467959375).

Almost surely, 2^{12021022221101} is an apocalyptic number.

It is an amenable number.

12021022221101 is a deficient number, since it is larger than the sum of its proper divisors (849616399).

12021022221101 is an equidigital number, since it uses as much as digits as its factorization.

12021022221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849616398.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021022221101 its reverse (10112222012021), we get a palindrome (22133244233122).

The spelling of 12021022221101 in words is "twelve trillion, twenty-one billion, twenty-two million, two hundred twenty-one thousand, one hundred one".