221212230113121 has 16 divisors (see below), whose sum is σ = 325025005964736. Its totient is φ = 132964775165376.

The previous prime is 221212230113113. The next prime is 221212230113197. The reversal of 221212230113121 is 121311032212122.

221212230113121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221212230113121 - 2³ = 221212230113113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221212230113091 and 221212230113100.

It is not an unprimeable number, because it can be changed into a prime (221212230113111) 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, 65954747910 + ... + 65954751263.

It is an arithmetic number, because the mean of its divisors is an integer number (20314062872796).

Almost surely, 2^{221212230113121} is an apocalyptic number.

It is an amenable number.

221212230113121 is a deficient number, since it is larger than the sum of its proper divisors (103812775851615).

221212230113121 is a wasteful number, since it uses less digits than its factorization.

221212230113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131909499232.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 221212230113121 its reverse (121311032212122), we get a palindrome (342523262325243).

The spelling of 221212230113121 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred thirty million, one hundred thirteen thousand, one hundred twenty-one".