22100011221220 has 48 divisors (see below), whose sum is σ = 46874448391680. Its totient is φ = 8751593321856.

The previous prime is 22100011221217. The next prime is 22100011221269. The reversal of 22100011221220 is 2212211000122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22100011221194 and 22100011221203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5398549 + ... + 8564131.

It is an arithmetic number, because the mean of its divisors is an integer number (976551008160).

Almost surely, 2^{22100011221220} is an apocalyptic number.

22100011221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22100011221220 is an abundant number, since it is smaller than the sum of its proper divisors (24774437170460).

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

22100011221220 is a wasteful number, since it uses less digits than its factorization.

22100011221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169084 (or 3169082 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22100011221220 its reverse (2212211000122), we get a palindrome (24312222221342).

The spelling of 22100011221220 in words is "twenty-two trillion, one hundred billion, eleven million, two hundred twenty-one thousand, two hundred twenty".