20000121223 has 4 divisors (see below), whose sum is σ = 21176598960. Its totient is φ = 18823643488.

The previous prime is 20000121173. The next prime is 20000121269. The reversal of 20000121223 is 32212100002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32212100002 = 2 ⋅16106050001.

It is a cyclic number.

It is not a de Polignac number, because 20000121223 - 2²⁵ = 19966566791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000121283) 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, 588238843 + ... + 588238876.

It is an arithmetic number, because the mean of its divisors is an integer number (5294149740).

Almost surely, 2^20000121223 is an apocalyptic number.

20000121223 is a deficient number, since it is larger than the sum of its proper divisors (1176477737).

20000121223 is a wasteful number, since it uses less digits than its factorization.

20000121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176477736.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20000121223 its reverse (32212100002), we get a palindrome (52212221225).

The spelling of 20000121223 in words is "twenty billion, one hundred twenty-one thousand, two hundred twenty-three".