221112222201020 has 24 divisors (see below), whose sum is σ = 464336666884944. Its totient is φ = 88444698354176.

The previous prime is 221112222200999. The next prime is 221112222201023. The reversal of 221112222201020 is 20102222211122.

It is a super-2 number, since 2×221112222201020² (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 = 221112222200983 and 221112222201001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112222201023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2198414 + ... + 21143733.

It is an arithmetic number, because the mean of its divisors is an integer number (19347361120206).

Almost surely, 2^{221112222201020} is an apocalyptic number.

221112222201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112222201020 is an abundant number, since it is smaller than the sum of its proper divisors (243224444683924).

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

221112222201020 is a wasteful number, since it uses less digits than its factorization.

221112222201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23815789 (or 23815787 counting only the distinct ones).

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

Adding to 221112222201020 its reverse (20102222211122), we get a palindrome (241214444412142).

The spelling of 221112222201020 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred one thousand, twenty".