21013211000 has 64 divisors (see below), whose sum is σ = 49203067680. Its totient is φ = 8399788800.

The previous prime is 21013210991. The next prime is 21013211017. The reversal of 21013211000 is 11231012.

It is a congruent number.

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, 1747007 + ... + 1758993.

Almost surely, 2^21013211000 is an apocalyptic number.

21013211000 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 21013211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24601533840).

21013211000 is an abundant number, since it is smaller than the sum of its proper divisors (28189856680).

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

21013211000 is a wasteful number, since it uses less digits than its factorization.

21013211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13761 (or 13747 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21013211000 its reverse (11231012), we get a palindrome (21024442012).

The spelling of 21013211000 in words is "twenty-one billion, thirteen million, two hundred eleven thousand".