212111011212210 has 160 divisors (see below), whose sum is σ = 622719165587904. Its totient is φ = 51377308560000.

The previous prime is 212111011212143. The next prime is 212111011212241. The reversal of 212111011212210 is 12212110111212.

It is a happy number.

212111011212210 is a `hidden beast` number, since 2 + 121 + 110 + 11 + 212 + 210 = 666.

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 79 ways as a sum of consecutive naturals, for example, 443985 + ... + 20601435.

Almost surely, 2^{212111011212210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212111011212210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311359582793952).

212111011212210 is an abundant number, since it is smaller than the sum of its proper divisors (410608154375694).

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

212111011212210 is a wasteful number, since it uses less digits than its factorization.

212111011212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20158662 (or 20158653 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212111011212210 its reverse (12212110111212), we get a palindrome (224323121323422).

The spelling of 212111011212210 in words is "two hundred twelve trillion, one hundred eleven billion, eleven million, two hundred twelve thousand, two hundred ten".