211222211110220 has 96 divisors (see below), whose sum is σ = 475345036123776. Its totient is φ = 78559868620800.

The previous prime is 211222211110219. The next prime is 211222211110243. The reversal of 211222211110220 is 22011112222112.

It is a super-2 number, since 2×211222211110220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211222211110192 and 211222211110201.

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, 7580150 + ... + 21906690.

It is an arithmetic number, because the mean of its divisors is an integer number (4951510792956).

Almost surely, 2^{211222211110220} is an apocalyptic number.

211222211110220 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 211222211110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237672518061888).

211222211110220 is an abundant number, since it is smaller than the sum of its proper divisors (264122825013556).

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

211222211110220 is a wasteful number, since it uses less digits than its factorization.

211222211110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14327091 (or 14327089 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211222211110220 its reverse (22011112222112), we get a palindrome (233233323332332).

The spelling of 211222211110220 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred eleven million, one hundred ten thousand, two hundred twenty".