211020102220 has 24 divisors (see below), whose sum is σ = 443257388784. Its totient is φ = 84386102976.

The previous prime is 211020102203. The next prime is 211020102257. The reversal of 211020102220 is 22201020112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 211020102220.

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 7 ways as a sum of consecutive naturals, for example, 1292134 + ... + 1446253.

It is an arithmetic number, because the mean of its divisors is an integer number (18469057866).

Almost surely, 2^211020102220 is an apocalyptic number.

211020102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211020102220 is an abundant number, since it is smaller than the sum of its proper divisors (232237286564).

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

211020102220 is a wasteful number, since it uses less digits than its factorization.

211020102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742249 (or 2742247 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211020102220 its reverse (22201020112), we get a palindrome (233221122332).

The spelling of 211020102220 in words is "two hundred eleven billion, twenty million, one hundred two thousand, two hundred twenty".