211222102210020 has 288 divisors, whose sum is σ = 708358487316480. Its totient is φ = 50518038401280.

The previous prime is 211222102210003. The next prime is 211222102210117. The reversal of 211222102210020 is 20012201222112.

It is a happy number.

211222102210020 is a `hidden beast` number, since 211 + 2 + 2 + 210 + 221 + 0 + 0 + 20 = 666.

It is a super-2 number, since 2×211222102210020² (a number of 29 digits) contains 22 as substring.

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 = 211222102209975 and 211222102210002.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 117266667 + ... + 119054253.

It is an arithmetic number, because the mean of its divisors is an integer number (2459578080960).

Almost surely, 2^{211222102210020} is an apocalyptic number.

211222102210020 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 211222102210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354179243658240).

211222102210020 is an abundant number, since it is smaller than the sum of its proper divisors (497136385106460).

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

211222102210020 is a wasteful number, since it uses less digits than its factorization.

211222102210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788415 (or 1788410 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211222102210020 its reverse (20012201222112), we get a palindrome (231234303432132).

The spelling of 211222102210020 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred two million, two hundred ten thousand, twenty".