20121023223 has 72 divisors (see below), whose sum is σ = 35187778080. Its totient is φ = 11033608320.

The previous prime is 20121023173. The next prime is 20121023233. The reversal of 20121023223 is 32232012102.

20121023223 is a `hidden beast` number, since 201 + 210 + 232 + 23 = 666.

It is not a de Polignac number, because 20121023223 - 2⁹ = 20121022711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121023196 and 20121023205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121023233) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2131053 + ... + 2140473.

It is an arithmetic number, because the mean of its divisors is an integer number (488719140).

Almost surely, 2^20121023223 is an apocalyptic number.

20121023223 is a deficient number, since it is larger than the sum of its proper divisors (15066754857).

20121023223 is a wasteful number, since it uses less digits than its factorization.

20121023223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9637 (or 9627 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20121023223 its reverse (32232012102), we get a palindrome (52353035325).

The spelling of 20121023223 in words is "twenty billion, one hundred twenty-one million, twenty-three thousand, two hundred twenty-three".