221022112012220 has 24 divisors (see below), whose sum is σ = 466227809384064. Its totient is φ = 88012392584256.

The previous prime is 221022112012213. The next prime is 221022112012231. The reversal of 221022112012220 is 22210211220122.

221022112012220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 221022112012192 and 221022112012201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24778259219 + ... + 24778268138.

It is an arithmetic number, because the mean of its divisors is an integer number (19426158724336).

Almost surely, 2^{221022112012220} is an apocalyptic number.

221022112012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022112012220 is an abundant number, since it is smaller than the sum of its proper divisors (245205697371844).

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

221022112012220 is a wasteful number, since it uses less digits than its factorization.

221022112012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49556527589 (or 49556527587 counting only the distinct ones).

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

Adding to 221022112012220 its reverse (22210211220122), we get a palindrome (243232323232342).

The spelling of 221022112012220 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred twelve million, twelve thousand, two hundred twenty".