20121000100222 has 64 divisors (see below), whose sum is σ = 37155642015744. Its totient is φ = 7981910845920.

The previous prime is 20121000100193. The next prime is 20121000100261. The reversal of 20121000100222 is 22200100012102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327209163 + ... + 327270649.

It is an arithmetic number, because the mean of its divisors is an integer number (580556906496).

Almost surely, 2^{20121000100222} is an apocalyptic number.

20121000100222 is a deficient number, since it is larger than the sum of its proper divisors (17034641915522).

20121000100222 is a wasteful number, since it uses less digits than its factorization.

20121000100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94333.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20121000100222 its reverse (22200100012102), we get a palindrome (42321100112324).

The spelling of 20121000100222 in words is "twenty trillion, one hundred twenty-one billion, one hundred thousand, two hundred twenty-two".