211021212210 has 64 divisors (see below), whose sum is σ = 533164446720. Its totient is φ = 53304799680.

The previous prime is 211021212209. The next prime is 211021212223. The reversal of 211021212210 is 12212120112.

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 211021212210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7973059 + ... + 7999481.

It is an arithmetic number, because the mean of its divisors is an integer number (8330694480).

Almost surely, 2^211021212210 is an apocalyptic number.

211021212210 is an abundant number, since it is smaller than the sum of its proper divisors (322143234510).

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

211021212210 is a wasteful number, since it uses less digits than its factorization.

211021212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40463.

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

Adding to 211021212210 its reverse (12212120112), we get a palindrome (223233332322).

The spelling of 211021212210 in words is "two hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred ten".