23001321000 has 512 divisors, whose sum is σ = 85722624000. Its totient is φ = 5023872000.

The previous prime is 23001320999. The next prime is 23001321121. The reversal of 23001321000 is 12310032.

It is a happy number.

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 127 ways as a sum of consecutive naturals, for example, 109010895 + ... + 109011105.

It is an arithmetic number, because the mean of its divisors is an integer number (167427000).

Almost surely, 2^23001321000 is an apocalyptic number.

23001321000 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 23001321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42861312000).

23001321000 is an abundant number, since it is smaller than the sum of its proper divisors (62721303000).

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

23001321000 is a wasteful number, since it uses less digits than its factorization.

23001321000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 23001321000 its reverse (12310032), we get a palindrome (23013631032).

The spelling of 23001321000 in words is "twenty-three billion, one million, three hundred twenty-one thousand".