12100222202021 has 12 divisors (see below), whose sum is σ = 12837514279044. Its totient is φ = 11398022563200.

The previous prime is 12100222201933. The next prime is 12100222202023. The reversal of 12100222202021 is 12020222200121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1283451081025 + 10816771120996 = 1132895^2 + 3288886^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12100222202021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100222202023) 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, 175427690 + ... + 175496651.

It is an arithmetic number, because the mean of its divisors is an integer number (1069792856587).

Almost surely, 2^{12100222202021} is an apocalyptic number.

It is an amenable number.

12100222202021 is a deficient number, since it is larger than the sum of its proper divisors (737292077023).

12100222202021 is an equidigital number, since it uses as much as digits as its factorization.

12100222202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350924440 (or 350924411 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12100222202021 its reverse (12020222200121), we get a palindrome (24120444402142).

The spelling of 12100222202021 in words is "twelve trillion, one hundred billion, two hundred twenty-two million, two hundred two thousand, twenty-one".