210111002000 has 80 divisors (see below), whose sum is σ = 508739462400. Its totient is φ = 83930083200.

The previous prime is 210111001999. The next prime is 210111002081. The reversal of 210111002000 is 200111012.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×210111002000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 1406921 + ... + 1549079.

It is an arithmetic number, because the mean of its divisors is an integer number (6359243280).

Almost surely, 2^210111002000 is an apocalyptic number.

210111002000 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 210111002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254369731200).

210111002000 is an abundant number, since it is smaller than the sum of its proper divisors (298628460400).

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

210111002000 is a wasteful number, since it uses less digits than its factorization.

210111002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142921 (or 142905 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 210111002000 its reverse (200111012), we get a palindrome (210311113012).

The spelling of 210111002000 in words is "two hundred ten billion, one hundred eleven million, two thousand".