211122021220220 has 48 divisors (see below), whose sum is σ = 509117218646400. Its totient is φ = 72731031232320.

The previous prime is 211122021220211. The next prime is 211122021220261. The reversal of 211122021220220 is 22022120221112.

It is a super-2 number, since 2×211122021220220² (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 = 211122021220192 and 211122021220201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25253826110 + ... + 25253834469.

It is an arithmetic number, because the mean of its divisors is an integer number (10606608721800).

Almost surely, 2^{211122021220220} is an apocalyptic number.

211122021220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211122021220220 is an abundant number, since it is smaller than the sum of its proper divisors (297995197426180).

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

211122021220220 is a wasteful number, since it uses less digits than its factorization.

211122021220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50507660618 (or 50507660616 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 211122021220220 its reverse (22022120221112), we get a palindrome (233144141441332).

The spelling of 211122021220220 in words is "two hundred eleven trillion, one hundred twenty-two billion, twenty-one million, two hundred twenty thousand, two hundred twenty".