221102222210121 has 16 divisors (see below), whose sum is σ = 338315670585728. Its totient is φ = 125819877484800.

The previous prime is 221102222210081. The next prime is 221102222210161. The reversal of 221102222210121 is 121012222201122.

It is an interprime number because it is at equal distance from previous prime (221102222210081) and next prime (221102222210161).

It is not a de Polignac number, because 221102222210121 - 2¹³ = 221102222201929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102222210161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21843723670 + ... + 21843733791.

It is an arithmetic number, because the mean of its divisors is an integer number (21144729411608).

Almost surely, 2^{221102222210121} is an apocalyptic number.

221102222210121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221102222210121 is a deficient number, since it is larger than the sum of its proper divisors (117213448375607).

221102222210121 is a wasteful number, since it uses less digits than its factorization.

221102222210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43687457712.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221102222210121 its reverse (121012222201122), we get a palindrome (342114444411243).

The spelling of 221102222210121 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty-two million, two hundred ten thousand, one hundred twenty-one".