221023000000 has 392 divisors, whose sum is σ = 608639709312. Its totient is φ = 78960000000.

The previous prime is 221022999917. The next prime is 221023000021. The reversal of 221023000000 is 320122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 780999859 + ... + 781000141.

Almost surely, 2^221023000000 is an apocalyptic number.

221023000000 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 221023000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304319854656).

221023000000 is an abundant number, since it is smaller than the sum of its proper divisors (387616709312).

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

221023000000 is an frugal number, since it uses more digits than its factorization.

221023000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 221023000000 its reverse (320122), we get a palindrome (221023320122).

The spelling of 221023000000 in words is "two hundred twenty-one billion, twenty-three million", and thus it is an aban number.