221001221022 has 8 divisors (see below), whose sum is σ = 442002442056. Its totient is φ = 73667073672.

The previous prime is 221001220981. The next prime is 221001221039. The reversal of 221001221022 is 220122100122.

It is a sphenic number, since it is the product of 3 distinct primes.

221001221022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 221001220992 and 221001221010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18416768413 + ... + 18416768424.

It is an arithmetic number, because the mean of its divisors is an integer number (55250305257).

Almost surely, 2^221001221022 is an apocalyptic number.

221001221022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221001221022 is a wasteful number, since it uses less digits than its factorization.

221001221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36833536842.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221001221022 its reverse (220122100122), we get a palindrome (441123321144).

The spelling of 221001221022 in words is "two hundred twenty-one billion, one million, two hundred twenty-one thousand, twenty-two".