22001111220020 has 12 divisors (see below), whose sum is σ = 46202333562084. Its totient is φ = 8800444488000.

The previous prime is 22001111220007. The next prime is 22001111220041. The reversal of 22001111220020 is 2002211110022.

It can be written as a sum of positive squares in 2 ways, for example, as 2265855836176 + 19735255383844 = 1505276^2 + 4442438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22001111219977 and 22001111220004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550027780481 + ... + 550027780520.

It is an arithmetic number, because the mean of its divisors is an integer number (3850194463507).

Almost surely, 2^{22001111220020} is an apocalyptic number.

22001111220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001111220020 is an abundant number, since it is smaller than the sum of its proper divisors (24201222342064).

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

22001111220020 is a wasteful number, since it uses less digits than its factorization.

22001111220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100055561010 (or 1100055561008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22001111220020 its reverse (2002211110022), we get a palindrome (24003322330042).

The spelling of 22001111220020 in words is "twenty-two trillion, one billion, one hundred eleven million, two hundred twenty thousand, twenty".