22121002202012 has 24 divisors (see below), whose sum is σ = 44265957947904. Its totient is φ = 9475296612912.

The previous prime is 22121002202011. The next prime is 22121002202077. The reversal of 22121002202012 is 21020220012122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121002202011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213818288 + ... + 213921719.

It is an arithmetic number, because the mean of its divisors is an integer number (1844414914496).

Almost surely, 2^{22121002202012} is an apocalyptic number.

It is an amenable number.

22121002202012 is an abundant number, since it is smaller than the sum of its proper divisors (22144955745892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121002202012 is a wasteful number, since it uses less digits than its factorization.

22121002202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427741865 (or 427741863 counting only the distinct ones).

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

Adding to 22121002202012 its reverse (21020220012122), we get a palindrome (43141222214134).

The spelling of 22121002202012 in words is "twenty-two trillion, one hundred twenty-one billion, two million, two hundred two thousand, twelve".