22012122221220 has 48 divisors (see below), whose sum is σ = 61634395186560. Its totient is φ = 5869856119296.

The previous prime is 22012122221213. The next prime is 22012122221227. The reversal of 22012122221220 is 2212222121022.

It is an interprime number because it is at equal distance from previous prime (22012122221213) and next prime (22012122221227).

It is not an unprimeable number, because it can be changed into a prime (22012122221227) 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, 7347489 + ... + 9899991.

It is an arithmetic number, because the mean of its divisors is an integer number (1284049899720).

Almost surely, 2^{22012122221220} is an apocalyptic number.

22012122221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012122221220 is an abundant number, since it is smaller than the sum of its proper divisors (39622272965340).

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

22012122221220 is a wasteful number, since it uses less digits than its factorization.

22012122221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696244 (or 2696242 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22012122221220 its reverse (2212222121022), we get a palindrome (24224344342242).

The spelling of 22012122221220 in words is "twenty-two trillion, twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".