20013212222123 has 4 divisors (see below), whose sum is σ = 20013519620160. Its totient is φ = 20012904824088.

The previous prime is 20013212221991. The next prime is 20013212222183. The reversal of 20013212222123 is 32122221231002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20013212222123 - 2¹⁰ = 20013212221099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013212222183) 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, 153601340 + ... + 153731577.

It is an arithmetic number, because the mean of its divisors is an integer number (5003379905040).

Almost surely, 2^{20013212222123} is an apocalyptic number.

20013212222123 is a deficient number, since it is larger than the sum of its proper divisors (307398037).

20013212222123 is an equidigital number, since it uses as much as digits as its factorization.

20013212222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307398036.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20013212222123 its reverse (32122221231002), we get a palindrome (52135433453125).

The spelling of 20013212222123 in words is "twenty trillion, thirteen billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-three".