211222212011020 has 144 divisors (see below), whose sum is σ = 516656177019360. Its totient is φ = 72324962712576.

The previous prime is 211222212011017. The next prime is 211222212011029. The reversal of 211222212011020 is 20110212222112.

It is a super-2 number, since 2×211222212011020² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211222212011029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11625408496 + ... + 11625426664.

It is an arithmetic number, because the mean of its divisors is an integer number (3587890118190).

Almost surely, 2^{211222212011020} is an apocalyptic number.

211222212011020 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 211222212011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258328088509680).

211222212011020 is an abundant number, since it is smaller than the sum of its proper divisors (305433965008340).

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

211222212011020 is a wasteful number, since it uses less digits than its factorization.

211222212011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32952 (or 32943 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211222212011020 its reverse (20110212222112), we get a palindrome (231332424233132).

The spelling of 211222212011020 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twelve million, eleven thousand, twenty".