221110102121001 has 32 divisors (see below), whose sum is σ = 320595925403520. Its totient is φ = 134984512889856.

The previous prime is 221110102120993. The next prime is 221110102121003. The reversal of 221110102121001 is 100121201011122.

It is a happy number.

It is not a de Polignac number, because 221110102121001 - 2³ = 221110102120993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221110102121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166884990 + ... + 168204696.

It is an arithmetic number, because the mean of its divisors is an integer number (10018622668860).

Almost surely, 2^{221110102121001} is an apocalyptic number.

It is an amenable number.

221110102121001 is a deficient number, since it is larger than the sum of its proper divisors (99485823282519).

221110102121001 is a wasteful number, since it uses less digits than its factorization.

221110102121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408553.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221110102121001 its reverse (100121201011122), we get a palindrome (321231303132123).

The spelling of 221110102121001 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred two million, one hundred twenty-one thousand, one".