221013102121 has 16 divisors (see below), whose sum is σ = 267614029440. Its totient is φ = 178183215360.

The previous prime is 221013102113. The next prime is 221013102157. The reversal of 221013102121 is 121201310122.

221013102121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221013102121 - 2³ = 221013102113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221013102095 and 221013102104.

It is not an unprimeable number, because it can be changed into a prime (221013102161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400210 + ... + 776011.

It is an arithmetic number, because the mean of its divisors is an integer number (16725876840).

Almost surely, 2^221013102121 is an apocalyptic number.

It is an amenable number.

221013102121 is a deficient number, since it is larger than the sum of its proper divisors (46600927319).

221013102121 is a wasteful number, since it uses less digits than its factorization.

221013102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177824.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221013102121 its reverse (121201310122), we get a palindrome (342214412243).

The spelling of 221013102121 in words is "two hundred twenty-one billion, thirteen million, one hundred two thousand, one hundred twenty-one".