211021112112220 has 48 divisors (see below), whose sum is σ = 453458159386848. Its totient is φ = 82443977441280.

The previous prime is 211021112112199. The next prime is 211021112112313. The reversal of 211021112112220 is 22211211120112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46343980 + ... + 50693260.

It is an arithmetic number, because the mean of its divisors is an integer number (9447044987226).

Almost surely, 2^{211021112112220} is an apocalyptic number.

211021112112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021112112220 is an abundant number, since it is smaller than the sum of its proper divisors (242437047274628).

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

211021112112220 is a wasteful number, since it uses less digits than its factorization.

211021112112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405750 (or 4405748 counting only the distinct ones).

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

Adding to 211021112112220 its reverse (22211211120112), we get a palindrome (233232323232332).

The spelling of 211021112112220 in words is "two hundred eleven trillion, twenty-one billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty".