12122201012021 has 4 divisors (see below), whose sum is σ = 12540207943500. Its totient is φ = 11704194080544.

The previous prime is 12122201012003. The next prime is 12122201012027. The reversal of 12122201012021 is 12021010222121.

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 3584058571921 + 8538142440100 = 1893161^2 + 2922010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122201012021 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 (12122201012027) 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, 209003465696 + ... + 209003465753.

It is an arithmetic number, because the mean of its divisors is an integer number (3135051985875).

Almost surely, 2^{12122201012021} is an apocalyptic number.

It is an amenable number.

12122201012021 is a deficient number, since it is larger than the sum of its proper divisors (418006931479).

12122201012021 is an equidigital number, since it uses as much as digits as its factorization.

12122201012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418006931478.

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

Adding to 12122201012021 its reverse (12021010222121), we get a palindrome (24143211234142).

The spelling of 12122201012021 in words is "twelve trillion, one hundred twenty-two billion, two hundred one million, twelve thousand, twenty-one".