22111222201020 has 72 divisors (see below), whose sum is σ = 67418224067376. Its totient is φ = 5865774999552.

The previous prime is 22111222200799. The next prime is 22111222201063. The reversal of 22111222201020 is 2010222211122.

It is a happy number.

22111222201020 is a `hidden beast` number, since 221 + 1 + 1 + 222 + 201 + 0 + 20 = 666.

It is a super-2 number, since 2×22111222201020² (a number of 27 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 = 22111222200984 and 22111222201002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 318203922 + ... + 318273401.

It is an arithmetic number, because the mean of its divisors is an integer number (936364223158).

Almost surely, 2^{22111222201020} is an apocalyptic number.

22111222201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111222201020 is an abundant number, since it is smaller than the sum of its proper divisors (45307001866356).

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

22111222201020 is a wasteful number, since it uses less digits than its factorization.

22111222201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636477531 (or 636477526 counting only the distinct ones).

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

Adding to 22111222201020 its reverse (2010222211122), we get a palindrome (24121444412142).

The spelling of 22111222201020 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred one thousand, twenty".