221102221211021 has 8 divisors (see below), whose sum is σ = 234194335130880. Its totient is φ = 208019674058688.

The previous prime is 221102221210903. The next prime is 221102221211057. The reversal of 221102221211021 is 120112122201122.

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 221102221211021 - 2³⁸ = 220827343304077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221102221210984 and 221102221211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102221211621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2391644291 + ... + 2391736736.

It is an arithmetic number, because the mean of its divisors is an integer number (29274291891360).

Almost surely, 2^{221102221211021} is an apocalyptic number.

It is an amenable number.

221102221211021 is a deficient number, since it is larger than the sum of its proper divisors (13092113919859).

221102221211021 is a wasteful number, since it uses less digits than its factorization.

221102221211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783383763.

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

Adding to 221102221211021 its reverse (120112122201122), we get a palindrome (341214343412143).

The spelling of 221102221211021 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty-one million, two hundred eleven thousand, twenty-one".