22213512021220 has 48 divisors (see below), whose sum is σ = 50414226851520. Its totient is φ = 8172930082176.

The previous prime is 22213512021203. The next prime is 22213512021221. The reversal of 22213512021220 is 2212021531222.

It is not an unprimeable number, because it can be changed into a prime (22213512021221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150874450 + ... + 151021609.

It is an arithmetic number, because the mean of its divisors is an integer number (1050296392740).

Almost surely, 2^{22213512021220} is an apocalyptic number.

22213512021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22213512021220 is an abundant number, since it is smaller than the sum of its proper divisors (28200714830300).

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

22213512021220 is a wasteful number, since it uses less digits than its factorization.

22213512021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301896364 (or 301896362 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 22213512021220 its reverse (2212021531222), we get a palindrome (24425533552442).

The spelling of 22213512021220 in words is "twenty-two trillion, two hundred thirteen billion, five hundred twelve million, twenty-one thousand, two hundred twenty".