211012221210 has 128 divisors (see below), whose sum is σ = 600249208320. Its totient is φ = 46450381824.

The previous prime is 211012221191. The next prime is 211012221271. The reversal of 211012221210 is 12122210112.

211012221210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211012221210.

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, 2374092 + ... + 2461368.

It is an arithmetic number, because the mean of its divisors is an integer number (4689446940).

Almost surely, 2^211012221210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211012221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300124604160).

211012221210 is an abundant number, since it is smaller than the sum of its proper divisors (389236987110).

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

211012221210 is a wasteful number, since it uses less digits than its factorization.

211012221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87720.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211012221210 its reverse (12122210112), we get a palindrome (223134431322).

The spelling of 211012221210 in words is "two hundred eleven billion, twelve million, two hundred twenty-one thousand, two hundred ten".