221111021211201 has 24 divisors (see below), whose sum is σ = 352009298388384. Its totient is φ = 132625167356160.

The previous prime is 221111021211181. The next prime is 221111021211233. The reversal of 221111021211201 is 102112120111122.

It is a happy number.

221111021211201 is a `hidden beast` number, since 221 + 1 + 1 + 10 + 21 + 211 + 201 = 666.

It is not a de Polignac number, because 221111021211201 - 2¹⁷ = 221111021080129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221111021212201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11512591731 + ... + 11512610936.

It is an arithmetic number, because the mean of its divisors is an integer number (14667054099516).

Almost surely, 2^{221111021211201} is an apocalyptic number.

It is an amenable number.

221111021211201 is a deficient number, since it is larger than the sum of its proper divisors (130898277177183).

221111021211201 is a wasteful number, since it uses less digits than its factorization.

221111021211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23025202781 (or 23025202778 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221111021211201 its reverse (102112120111122), we get a palindrome (323223141322323).

The spelling of 221111021211201 in words is "two hundred twenty-one trillion, one hundred eleven billion, twenty-one million, two hundred eleven thousand, two hundred one".