221122221011021 has 8 divisors (see below), whose sum is σ = 253920253792800. Its totient is φ = 190440190344240.

The previous prime is 221122221010973. The next prime is 221122221011053. The reversal of 221122221011021 is 120110122221122.

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

It is a cyclic number.

It is not a de Polignac number, because 221122221011021 - 2³⁴ = 221105041141837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221122221010984 and 221122221011002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122221511021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529000528526 + ... + 529000528943.

It is an arithmetic number, because the mean of its divisors is an integer number (31740031724100).

Almost surely, 2^{221122221011021} is an apocalyptic number.

It is an amenable number.

221122221011021 is a deficient number, since it is larger than the sum of its proper divisors (32798032781779).

221122221011021 is a wasteful number, since it uses less digits than its factorization.

221122221011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058001057499.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221122221011021 its reverse (120110122221122), we get a palindrome (341232343232143).

The spelling of 221122221011021 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-one million, eleven thousand, twenty-one".