221211012112111 has 16 divisors (see below), whose sum is σ = 270443541807936. Its totient is φ = 176616190550016.

The previous prime is 221211012112093. The next prime is 221211012112127. The reversal of 221211012112111 is 111211210112122.

It is not a de Polignac number, because 221211012112111 - 2⁴¹ = 219011988856559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211012112151) 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, 9582030046 + ... + 9582053131.

It is an arithmetic number, because the mean of its divisors is an integer number (16902721362996).

Almost surely, 2^{221211012112111} is an apocalyptic number.

221211012112111 is a deficient number, since it is larger than the sum of its proper divisors (49232529695825).

221211012112111 is a wasteful number, since it uses less digits than its factorization.

221211012112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19164083298.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 221211012112111 its reverse (111211210112122), we get a palindrome (332422222224233).

The spelling of 221211012112111 in words is "two hundred twenty-one trillion, two hundred eleven billion, twelve million, one hundred twelve thousand, one hundred eleven".