221002021222220 has 96 divisors (see below), whose sum is σ = 530768742862848. Its totient is φ = 75720151199232.

The previous prime is 221002021222217. The next prime is 221002021222231. The reversal of 221002021222220 is 22222120200122.

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 = 221002021222192 and 221002021222201.

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, 1575555809 + ... + 1575696071.

It is an arithmetic number, because the mean of its divisors is an integer number (5528841071488).

Almost surely, 2^{221002021222220} is an apocalyptic number.

221002021222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002021222220 is an abundant number, since it is smaller than the sum of its proper divisors (309766721640628).

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

221002021222220 is a wasteful number, since it uses less digits than its factorization.

221002021222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147919 (or 147917 counting only the distinct ones).

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

Adding to 221002021222220 its reverse (22222120200122), we get a palindrome (243224141422342).

The spelling of 221002021222220 in words is "two hundred twenty-one trillion, two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".