22011001001220 has 192 divisors, whose sum is σ = 78140750284800. Its totient is φ = 4496193853440.

The previous prime is 22011001001131. The next prime is 22011001001221. The reversal of 22011001001220 is 2210010011022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22011001001196 and 22011001001205.

It is not an unprimeable number, because it can be changed into a prime (22011001001221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40102725 + ... + 40647884.

It is an arithmetic number, because the mean of its divisors is an integer number (406983074400).

Almost surely, 2^{22011001001220} is an apocalyptic number.

22011001001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22011001001220 is an abundant number, since it is smaller than the sum of its proper divisors (56129749283580).

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

22011001001220 is a wasteful number, since it uses less digits than its factorization.

22011001001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80750698 (or 80750696 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22011001001220 its reverse (2210010011022), we get a palindrome (24221011012242).

The spelling of 22011001001220 in words is "twenty-two trillion, eleven billion, one million, one thousand, two hundred twenty".