211212120210 has 128 divisors (see below), whose sum is σ = 630898813440. Its totient is φ = 44062672896.

The previous prime is 211212120193. The next prime is 211212120221. The reversal of 211212120210 is 12021212112.

It is a super-2 number, since 2×211212120210² (a number of 23 digits) contains 22 as substring.

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 211212120210.

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, 191677 + ... + 677616.

It is an arithmetic number, because the mean of its divisors is an integer number (4928896980).

Almost surely, 2^211212120210 is an apocalyptic number.

211212120210 is an abundant number, since it is smaller than the sum of its proper divisors (419686693230).

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

211212120210 is a wasteful number, since it uses less digits than its factorization.

211212120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869412.

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

Adding to 211212120210 its reverse (12021212112), we get a palindrome (223233332322).

The spelling of 211212120210 in words is "two hundred eleven billion, two hundred twelve million, one hundred twenty thousand, two hundred ten".