221022120021121 has 16 divisors (see below), whose sum is σ = 234099598981248. Its totient is φ = 207953112326400.

The previous prime is 221022120021113. The next prime is 221022120021127. The reversal of 221022120021121 is 121120021220122.

It is not a de Polignac number, because 221022120021121 - 2³ = 221022120021113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022120021127) 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, 1104883516 + ... + 1105083538.

It is an arithmetic number, because the mean of its divisors is an integer number (14631224936328).

Almost surely, 2^{221022120021121} is an apocalyptic number.

It is an amenable number.

221022120021121 is a deficient number, since it is larger than the sum of its proper divisors (13077478960127).

221022120021121 is a wasteful number, since it uses less digits than its factorization.

221022120021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220872.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221022120021121 its reverse (121120021220122), we get a palindrome (342142141241243).

The spelling of 221022120021121 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred twenty million, twenty-one thousand, one hundred twenty-one".