21111313000 has 64 divisors (see below), whose sum is σ = 49649184000. Its totient is φ = 8402011200.

The previous prime is 21111312983. The next prime is 21111313021. The reversal of 21111313000 is 31311112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145957 + ... + 252043.

It is an arithmetic number, because the mean of its divisors is an integer number (775768500).

Almost surely, 2^21111313000 is an apocalyptic number.

21111313000 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 21111313000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24824592000).

21111313000 is an abundant number, since it is smaller than the sum of its proper divisors (28537871000).

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

21111313000 is a wasteful number, since it uses less digits than its factorization.

21111313000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106307 (or 106293 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21111313000 its reverse (31311112), we get a palindrome (21142624112).

The spelling of 21111313000 in words is "twenty-one billion, one hundred eleven million, three hundred thirteen thousand".