22001121001220 has 12 divisors (see below), whose sum is σ = 46202354102604. Its totient is φ = 8800448400480.

The previous prime is 22001121001193. The next prime is 22001121001261. The reversal of 22001121001220 is 2210012110022.

It can be written as a sum of positive squares in 2 ways, for example, as 14594493435076 + 7406627566144 = 3820274^2 + 2721512^2 .

It is a super-3 number, since 3×22001121001220³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22001121001195 and 22001121001204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550028025011 + ... + 550028025050.

It is an arithmetic number, because the mean of its divisors is an integer number (3850196175217).

Almost surely, 2^{22001121001220} is an apocalyptic number.

22001121001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001121001220 is an abundant number, since it is smaller than the sum of its proper divisors (24201233101384).

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

22001121001220 is a wasteful number, since it uses less digits than its factorization.

22001121001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100056050070 (or 1100056050068 counting only the distinct ones).

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

Adding to 22001121001220 its reverse (2210012110022), we get a palindrome (24211133111242).

The spelling of 22001121001220 in words is "twenty-two trillion, one billion, one hundred twenty-one million, one thousand, two hundred twenty".