221102102021 has 8 divisors (see below), whose sum is σ = 226104729600. Its totient is φ = 216111904848.

The previous prime is 221102101993. The next prime is 221102102027. The reversal of 221102102021 is 120201201122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221102102021 is a prime.

It is a super-2 number, since 2×221102102021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221102101987 and 221102102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102102027) 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, 3071621 + ... + 3142778.

It is an arithmetic number, because the mean of its divisors is an integer number (28263091200).

Almost surely, 2^221102102021 is an apocalyptic number.

It is an amenable number.

221102102021 is a deficient number, since it is larger than the sum of its proper divisors (5002627579).

221102102021 is an equidigital number, since it uses as much as digits as its factorization.

221102102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215203.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221102102021 its reverse (120201201122), we get a palindrome (341303303143).

The spelling of 221102102021 in words is "two hundred twenty-one billion, one hundred two million, one hundred two thousand, twenty-one".