211211021112220 has 12 divisors (see below), whose sum is σ = 443543144335704. Its totient is φ = 84484408444880.

The previous prime is 211211021112191. The next prime is 211211021112233. The reversal of 211211021112220 is 22211120112112.

It is a happy number.

It is a super-2 number, since 2×211211021112220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5280275527786 + ... + 5280275527825.

It is an arithmetic number, because the mean of its divisors is an integer number (36961928694642).

Almost surely, 2^{211211021112220} is an apocalyptic number.

211211021112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211211021112220 is an abundant number, since it is smaller than the sum of its proper divisors (232332123223484).

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

211211021112220 is a wasteful number, since it uses less digits than its factorization.

211211021112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560551055620 (or 10560551055618 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211211021112220 its reverse (22211120112112), we get a palindrome (233422141224332).

The spelling of 211211021112220 in words is "two hundred eleven trillion, two hundred eleven billion, twenty-one million, one hundred twelve thousand, two hundred twenty".