201123213000 has 256 divisors, whose sum is σ = 639005552640. Its totient is φ = 52655328000.

The previous prime is 201123212999. The next prime is 201123213001. The reversal of 201123213000 is 312321102.

It is an interprime number because it is at equal distance from previous prime (201123212999) and next prime (201123213001).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (201123213001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66529489 + ... + 66532511.

It is an arithmetic number, because the mean of its divisors is an integer number (2496115440).

Almost surely, 2^201123213000 is an apocalyptic number.

201123213000 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 201123213000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319502776320).

201123213000 is an abundant number, since it is smaller than the sum of its proper divisors (437882339640).

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

201123213000 is a wasteful number, since it uses less digits than its factorization.

201123213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445 (or 3431 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 201123213000 its reverse (312321102), we get a palindrome (201435534102).

The spelling of 201123213000 in words is "two hundred one billion, one hundred twenty-three million, two hundred thirteen thousand".