221002222012220 has 96 divisors (see below), whose sum is σ = 532954537678080. Its totient is φ = 76133111016960.

The previous prime is 221002222012147. The next prime is 221002222012241. The reversal of 221002222012220 is 22210222200122.

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 = 221002222012192 and 221002222012201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 204083519 + ... + 205163561.

It is an arithmetic number, because the mean of its divisors is an integer number (5551609767480).

Almost surely, 2^{221002222012220} is an apocalyptic number.

221002222012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002222012220 is an abundant number, since it is smaller than the sum of its proper divisors (311952315665860).

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

221002222012220 is a wasteful number, since it uses less digits than its factorization.

221002222012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129035 (or 1129033 counting only the distinct ones).

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

Adding to 221002222012220 its reverse (22210222200122), we get a palindrome (243212444212342).

It can be divided in two parts, 2210022 and 22012220, that added together give a palindrome (24222242).

The spelling of 221002222012220 in words is "two hundred twenty-one trillion, two billion, two hundred twenty-two million, twelve thousand, two hundred twenty".