20140123221 has 12 divisors (see below), whose sum is σ = 29441787648. Its totient is φ = 13264980264.

The previous prime is 20140123187. The next prime is 20140123273. The reversal of 20140123221 is 12232104102.

It is a happy number.

20140123221 is a `hidden beast` number, since 20 + 1 + 401 + 23 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20140123221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20140123194 and 20140123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140123321) 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, 13479925 + ... + 13481418.

It is an arithmetic number, because the mean of its divisors is an integer number (2453482304).

Almost surely, 2^20140123221 is an apocalyptic number.

It is an amenable number.

20140123221 is a deficient number, since it is larger than the sum of its proper divisors (9301664427).

20140123221 is a wasteful number, since it uses less digits than its factorization.

20140123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26961432 (or 26961429 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20140123221 its reverse (12232104102), we get a palindrome (32372227323).

The spelling of 20140123221 in words is "twenty billion, one hundred forty million, one hundred twenty-three thousand, two hundred twenty-one".