21101322000 has 320 divisors, whose sum is σ = 76229906688. Its totient is φ = 4976640000.

The previous prime is 21101321999. The next prime is 21101322023. The reversal of 21101322000 is 22310112.

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, 2437680 + ... + 2446320.

Almost surely, 2^21101322000 is an apocalyptic number.

21101322000 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 21101322000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38114953344).

21101322000 is an abundant number, since it is smaller than the sum of its proper divisors (55128584688).

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

21101322000 is a wasteful number, since it uses less digits than its factorization.

21101322000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715 (or 8699 counting only the distinct ones).

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

Adding to 21101322000 its reverse (22310112), we get a palindrome (21123632112).

The spelling of 21101322000 in words is "twenty-one billion, one hundred one million, three hundred twenty-two thousand".