211223123000 has 128 divisors (see below), whose sum is σ = 506406401280. Its totient is φ = 82424934400.

The previous prime is 211223122997. The next prime is 211223123003. The reversal of 211223123000 is 321322112.

It is an interprime number because it is at equal distance from previous prime (211223122997) and next prime (211223123003).

It is a self number, because there is not a number n which added to its sum of digits gives 211223123000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211223123003) 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, 14891912 + ... + 14906088.

It is an arithmetic number, because the mean of its divisors is an integer number (3956300010).

Almost surely, 2^211223123000 is an apocalyptic number.

211223123000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211223123000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253203200640).

211223123000 is an abundant number, since it is smaller than the sum of its proper divisors (295183278280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211223123000 is a wasteful number, since it uses less digits than its factorization.

211223123000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14562 (or 14548 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 211223123000 its reverse (321322112), we get a palindrome (211544445112).

The spelling of 211223123000 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred twenty-three thousand".