20120321223 has 12 divisors (see below), whose sum is σ = 29076679008. Its totient is φ = 13407089280.

The previous prime is 20120321209. The next prime is 20120321231. The reversal of 20120321223 is 32212302102.

20120321223 is a `hidden beast` number, since 2 + 0 + 120 + 321 + 223 = 666.

It is not a de Polignac number, because 20120321223 - 2³² = 15825353927 is a prime.

It is a super-2 number, since 2×20120321223² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20120321196 and 20120321205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120321203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 518415 + ... + 555872.

It is an arithmetic number, because the mean of its divisors is an integer number (2423056584).

Almost surely, 2^20120321223 is an apocalyptic number.

20120321223 is a deficient number, since it is larger than the sum of its proper divisors (8956357785).

20120321223 is a wasteful number, since it uses less digits than its factorization.

20120321223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076374 (or 1076371 counting only the distinct ones).

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

Adding to 20120321223 its reverse (32212302102), we get a palindrome (52332623325).

The spelling of 20120321223 in words is "twenty billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-three".