22111021212220 has 12 divisors (see below), whose sum is σ = 46433144545704. Its totient is φ = 8844408484880.

The previous prime is 22111021212179. The next prime is 22111021212223. The reversal of 22111021212220 is 2221212011122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111021212223) by changing a digit.

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, 552775530286 + ... + 552775530325.

It is an arithmetic number, because the mean of its divisors is an integer number (3869428712142).

Almost surely, 2^{22111021212220} is an apocalyptic number.

22111021212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111021212220 is an abundant number, since it is smaller than the sum of its proper divisors (24322123333484).

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

22111021212220 is a wasteful number, since it uses less digits than its factorization.

22111021212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105551060620 (or 1105551060618 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22111021212220 its reverse (2221212011122), we get a palindrome (24332233223342).

The spelling of 22111021212220 in words is "twenty-two trillion, one hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred twenty".