201123021000 has 256 divisors, whose sum is σ = 686158387200. Its totient is φ = 48642528000.

The previous prime is 201123020927. The next prime is 201123021013. The reversal of 201123021000 is 120321102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14480059 + ... + 14493941.

It is an arithmetic number, because the mean of its divisors is an integer number (2680306200).

Almost surely, 2^201123021000 is an apocalyptic number.

201123021000 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 201123021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343079193600).

201123021000 is an abundant number, since it is smaller than the sum of its proper divisors (485035366200).

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

201123021000 is a wasteful number, since it uses less digits than its factorization.

201123021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14357 (or 14343 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 201123021000 its reverse (120321102), we get a palindrome (201243342102).

The spelling of 201123021000 in words is "two hundred one billion, one hundred twenty-three million, twenty-one thousand".