221122011220020 has 48 divisors (see below), whose sum is σ = 687935146019520. Its totient is φ = 58965869658528.

The previous prime is 221122011219997. The next prime is 221122011220031. The reversal of 221122011220020 is 20022110221122.

It is a happy number.

221122011220020 is a `hidden beast` number, since 2 + 211 + 220 + 1 + 12 + 200 + 20 = 666.

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 = 221122011219975 and 221122011220002.

It is a congruent number.

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, 204742602442 + ... + 204742603521.

It is an arithmetic number, because the mean of its divisors is an integer number (14331982208740).

Almost surely, 2^{221122011220020} is an apocalyptic number.

221122011220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122011220020 is an abundant number, since it is smaller than the sum of its proper divisors (466813134799500).

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

221122011220020 is a wasteful number, since it uses less digits than its factorization.

221122011220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409485205981 (or 409485205973 counting only the distinct ones).

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

Adding to 221122011220020 its reverse (20022110221122), we get a palindrome (241144121441142).

The spelling of 221122011220020 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, eleven million, two hundred twenty thousand, twenty".