221112010101001 has 4 divisors (see below), whose sum is σ = 221285159679492. Its totient is φ = 220938860522512.

The previous prime is 221112010100957. The next prime is 221112010101023. The reversal of 221112010101001 is 100101010211122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121431055219776 + 99680954881225 = 11019576^2 + 9984035^2 .

It is a cyclic number.

It is not a de Polignac number, because 221112010101001 - 2²⁵ = 221111976546569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221112014101001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86574787330 + ... + 86574789883.

It is an arithmetic number, because the mean of its divisors is an integer number (55321289919873).

Almost surely, 2^{221112010101001} is an apocalyptic number.

It is an amenable number.

221112010101001 is a deficient number, since it is larger than the sum of its proper divisors (173149578491).

221112010101001 is a wasteful number, since it uses less digits than its factorization.

221112010101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173149578490.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221112010101001 its reverse (100101010211122), we get a palindrome (321213020312123).

The spelling of 221112010101001 in words is "two hundred twenty-one trillion, one hundred twelve billion, ten million, one hundred one thousand, one".