20121223220022 has 16 divisors (see below), whose sum is σ = 40242503770560. Its totient is φ = 6707064851592.

The previous prime is 20121223220017. The next prime is 20121223220023. The reversal of 20121223220022 is 22002232212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121223220023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3168229 + ... + 7090847.

It is an arithmetic number, because the mean of its divisors is an integer number (2515156485660).

Almost surely, 2^{20121223220022} is an apocalyptic number.

20121223220022 is an abundant number, since it is smaller than the sum of its proper divisors (20121280550538).

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

20121223220022 is a wasteful number, since it uses less digits than its factorization.

20121223220022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777547.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20121223220022 its reverse (22002232212102), we get a palindrome (42123455432124).

The spelling of 20121223220022 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-three million, two hundred twenty thousand, twenty-two".