221102121101 has 4 divisors (see below), whose sum is σ = 226494855804. Its totient is φ = 215709386400.

The previous prime is 221102121073. The next prime is 221102121113. The reversal of 221102121101 is 101121201122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101121201122 = 2 ⋅50560600561.

It can be written as a sum of positive squares in 2 ways, for example, as 72991828900 + 148110292201 = 270170^2 + 384851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221102121101 is a prime.

It is a super-2 number, since 2×221102121101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102121181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2696367290 + ... + 2696367371.

It is an arithmetic number, because the mean of its divisors is an integer number (56623713951).

Almost surely, 2^221102121101 is an apocalyptic number.

It is an amenable number.

221102121101 is a deficient number, since it is larger than the sum of its proper divisors (5392734703).

221102121101 is an equidigital number, since it uses as much as digits as its factorization.

221102121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392734702.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221102121101 its reverse (101121201122), we get a palindrome (322223322223).

The spelling of 221102121101 in words is "two hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, one hundred one".