211021012260 has 144 divisors (see below), whose sum is σ = 670702032000. Its totient is φ = 53602053120.

The previous prime is 211021012259. The next prime is 211021012271. The reversal of 211021012260 is 62210120112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 891991 + ... + 1103489.

It is an arithmetic number, because the mean of its divisors is an integer number (4657653000).

Almost surely, 2^211021012260 is an apocalyptic number.

211021012260 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 211021012260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335351016000).

211021012260 is an abundant number, since it is smaller than the sum of its proper divisors (459681019740).

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

211021012260 is a wasteful number, since it uses less digits than its factorization.

211021012260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211778 (or 211773 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211021012260 its reverse (62210120112), we get a palindrome (273231132372).

The spelling of 211021012260 in words is "two hundred eleven billion, twenty-one million, twelve thousand, two hundred sixty".