22123203123 has 32 divisors (see below), whose sum is σ = 34106458624. Its totient is φ = 12494103552.

The previous prime is 22123203097. The next prime is 22123203127. The reversal of 22123203123 is 32130232122.

It is a happy number.

It is not a de Polignac number, because 22123203123 - 2¹² = 22123199027 is a prime.

It is a super-2 number, since 2×22123203123² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 22123203123.

It is not an unprimeable number, because it can be changed into a prime (22123203127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1534836 + ... + 1549182.

It is an arithmetic number, because the mean of its divisors is an integer number (1065826832).

Almost surely, 2^22123203123 is an apocalyptic number.

22123203123 is a deficient number, since it is larger than the sum of its proper divisors (11983255501).

22123203123 is a wasteful number, since it uses less digits than its factorization.

22123203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15211.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 22123203123 its reverse (32130232122), we get a palindrome (54253435245).

The spelling of 22123203123 in words is "twenty-two billion, one hundred twenty-three million, two hundred three thousand, one hundred twenty-three".