20121222100223 has 4 divisors (see below), whose sum is σ = 20121231350400. Its totient is φ = 20121212850048.

The previous prime is 20121222100211. The next prime is 20121222100271. The reversal of 20121222100223 is 32200122212102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20121222100223 - 2⁸ = 20121222099967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121222100195 and 20121222100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121222100723) 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, 621986 + ... + 6374112.

It is an arithmetic number, because the mean of its divisors is an integer number (5030307837600).

Almost surely, 2^{20121222100223} is an apocalyptic number.

20121222100223 is a deficient number, since it is larger than the sum of its proper divisors (9250177).

20121222100223 is an equidigital number, since it uses as much as digits as its factorization.

20121222100223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250176.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20121222100223 its reverse (32200122212102), we get a palindrome (52321344312325).

The spelling of 20121222100223 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-three".