211211222111010 has 96 divisors (see below), whose sum is σ = 599089888418112. Its totient is φ = 51201177056640.

The previous prime is 211211222111009. The next prime is 211211222111011. The reversal of 211211222111010 is 10111222112112.

It is a happy number.

211211222111010 is a `hidden beast` number, since 211 + 2 + 112 + 221 + 110 + 10 = 666.

It is an interprime number because it is at equal distance from previous prime (211211222111009) and next prime (211211222111011).

It is a super-2 number, since 2×211211222111010² (a number of 29 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (211211222111011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29814672 + ... + 36212388.

It is an arithmetic number, because the mean of its divisors is an integer number (6240519671022).

Almost surely, 2^{211211222111010} is an apocalyptic number.

211211222111010 is an abundant number, since it is smaller than the sum of its proper divisors (387878666307102).

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

211211222111010 is a wasteful number, since it uses less digits than its factorization.

211211222111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6431088 (or 6431085 counting only the distinct ones).

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

Adding to 211211222111010 its reverse (10111222112112), we get a palindrome (221322444223122).

The spelling of 211211222111010 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, ten".