211121002220 has 24 divisors (see below), whose sum is σ = 444056752608. Its totient is φ = 84314563200.

The previous prime is 211121002219. The next prime is 211121002229. The reversal of 211121002220 is 22200121112.

It is a junction number, because it is equal to n+sod(n) for n = 211121002195 and 211121002204.

It is not an unprimeable number, because it can be changed into a prime (211121002229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8351921 + ... + 8377160.

It is an arithmetic number, because the mean of its divisors is an integer number (18502364692).

Almost surely, 2^211121002220 is an apocalyptic number.

211121002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121002220 is an abundant number, since it is smaller than the sum of its proper divisors (232935750388).

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

211121002220 is a wasteful number, since it uses less digits than its factorization.

211121002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16729721 (or 16729719 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211121002220 its reverse (22200121112), we get a palindrome (233321123332).

The spelling of 211121002220 in words is "two hundred eleven billion, one hundred twenty-one million, two thousand, two hundred twenty".