221211102022220 has 48 divisors (see below), whose sum is σ = 470817219993120. Its totient is φ = 87296379250176.

The previous prime is 221211102022151. The next prime is 221211102022259. The reversal of 221211102022220 is 22220201112122.

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 = 221211102022192 and 221211102022201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217245242 + ... + 218261121.

It is an arithmetic number, because the mean of its divisors is an integer number (9808692083190).

Almost surely, 2^{221211102022220} is an apocalyptic number.

221211102022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211102022220 is an abundant number, since it is smaller than the sum of its proper divisors (249606117970900).

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

221211102022220 is a wasteful number, since it uses less digits than its factorization.

221211102022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435506714 (or 435506712 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221211102022220 its reverse (22220201112122), we get a palindrome (243431303134342).

The spelling of 221211102022220 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred two million, twenty-two thousand, two hundred twenty".