20221222221220 has 48 divisors (see below), whose sum is σ = 43266864432960. Its totient is φ = 7935677882496.

The previous prime is 20221222221209. The next prime is 20221222221223. The reversal of 20221222221220 is 2212222212202.

It is a junction number, because it is equal to n+sod(n) for n = 20221222221191 and 20221222221200.

It is not an unprimeable number, because it can be changed into a prime (20221222221223) 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, 46613839 + ... + 47045641.

It is an arithmetic number, because the mean of its divisors is an integer number (901393009020).

Almost surely, 2^{20221222221220} is an apocalyptic number.

20221222221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221222221220 is an abundant number, since it is smaller than the sum of its proper divisors (23045642211740).

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

20221222221220 is a wasteful number, since it uses less digits than its factorization.

20221222221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476044 (or 476042 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20221222221220 its reverse (2212222212202), we get a palindrome (22433444433422).

The spelling of 20221222221220 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty".