221011110012121 has 48 divisors (see below), whose sum is σ = 266140033475328. Its totient is φ = 181890900734400.

The previous prime is 221011110012107. The next prime is 221011110012137. The reversal of 221011110012121 is 121210011110122.

It is not a de Polignac number, because 221011110012121 - 2²⁹ = 221010573141209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221011110012095 and 221011110012104.

It is not an unprimeable number, because it can be changed into a prime (221011110012151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24365086 + ... + 32181976.

It is an arithmetic number, because the mean of its divisors is an integer number (5544584030736).

Almost surely, 2^{221011110012121} is an apocalyptic number.

It is an amenable number.

221011110012121 is a deficient number, since it is larger than the sum of its proper divisors (45128923463207).

221011110012121 is a wasteful number, since it uses less digits than its factorization.

221011110012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7817222 (or 7817209 counting only the distinct ones).

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

Adding to 221011110012121 its reverse (121210011110122), we get a palindrome (342221121122243).

The spelling of 221011110012121 in words is "two hundred twenty-one trillion, eleven billion, one hundred ten million, twelve thousand, one hundred twenty-one".