211022202120 has 128 divisors (see below), whose sum is σ = 653771139840. Its totient is φ = 54449003520.

The previous prime is 211022202109. The next prime is 211022202163. The reversal of 211022202120 is 21202220112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211022202120.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672349 + ... + 934931.

It is an arithmetic number, because the mean of its divisors is an integer number (5107587030).

Almost surely, 2^211022202120 is an apocalyptic number.

211022202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211022202120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326885569920).

211022202120 is an abundant number, since it is smaller than the sum of its proper divisors (442748937720).

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

211022202120 is a wasteful number, since it uses less digits than its factorization.

211022202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262815 (or 262811 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 211022202120 its reverse (21202220112), we get a palindrome (232224422232).

It can be divided in two parts, 21102 and 2202120, that added together give a palindrome (2223222).

The spelling of 211022202120 in words is "two hundred eleven billion, twenty-two million, two hundred two thousand, one hundred twenty".