211121011202220 has 144 divisors (see below), whose sum is σ = 731898240353280. Its totient is φ = 48255435427968.

The previous prime is 211121011202197. The next prime is 211121011202251. The reversal of 211121011202220 is 22202110121112.

211121011202220 is a `hidden beast` number, since 2 + 111 + 210 + 1 + 120 + 2 + 220 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 211121011202193 and 211121011202202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76818729 + ... + 79519551.

It is an arithmetic number, because the mean of its divisors is an integer number (5082626669120).

Almost surely, 2^{211121011202220} is an apocalyptic number.

211121011202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121011202220 is an abundant number, since it is smaller than the sum of its proper divisors (520777229151060).

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

211121011202220 is a wasteful number, since it uses less digits than its factorization.

211121011202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762884 (or 2762879 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211121011202220 its reverse (22202110121112), we get a palindrome (233323121323332).

The spelling of 211121011202220 in words is "two hundred eleven trillion, one hundred twenty-one billion, eleven million, two hundred two thousand, two hundred twenty".