20210223123 has 6 divisors (see below), whose sum is σ = 29192544524. Its totient is φ = 13473482076.

The previous prime is 20210223079. The next prime is 20210223157. The reversal of 20210223123 is 32132201202.

It is not a de Polignac number, because 20210223123 - 2¹² = 20210219027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210223096 and 20210223105.

It is not an unprimeable number, because it can be changed into a prime (20210223223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122790165 + ... + 1122790182.

Almost surely, 2^20210223123 is an apocalyptic number.

20210223123 is a deficient number, since it is larger than the sum of its proper divisors (8982321401).

20210223123 is a wasteful number, since it uses less digits than its factorization.

20210223123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245580353 (or 2245580350 counting only the distinct ones).

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

Adding to 20210223123 its reverse (32132201202), we get a palindrome (52342424325).

The spelling of 20210223123 in words is "twenty billion, two hundred ten million, two hundred twenty-three thousand, one hundred twenty-three".