22021222201220 has 96 divisors (see below), whose sum is σ = 51624970379136. Its totient is φ = 7821017164800.

The previous prime is 22021222201151. The next prime is 22021222201273. The reversal of 22021222201220 is 2210222212022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22021222201192 and 22021222201201.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 180445262 + ... + 180567258.

It is an arithmetic number, because the mean of its divisors is an integer number (537760108116).

Almost surely, 2^{22021222201220} is an apocalyptic number.

22021222201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22021222201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25812485189568).

22021222201220 is an abundant number, since it is smaller than the sum of its proper divisors (29603748177916).

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

22021222201220 is a wasteful number, since it uses less digits than its factorization.

22021222201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141141 (or 141139 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22021222201220 its reverse (2210222212022), we get a palindrome (24231444413242).

The spelling of 22021222201220 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty".