221102212011001 has 4 divisors (see below), whose sum is σ = 222019648575604. Its totient is φ = 220184775446400.

The previous prime is 221102212010957. The next prime is 221102212011101. The reversal of 221102212011001 is 100110212201122.

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 77043646057401 + 144058565953600 = 8777451^2 + 12002440^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102212011001 - 2¹⁵ = 221102211978233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102212011101) 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, 458718281940 + ... + 458718282421.

It is an arithmetic number, because the mean of its divisors is an integer number (55504912143901).

Almost surely, 2^{221102212011001} is an apocalyptic number.

It is an amenable number.

221102212011001 is a deficient number, since it is larger than the sum of its proper divisors (917436564603).

221102212011001 is an equidigital number, since it uses as much as digits as its factorization.

221102212011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917436564602.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221102212011001 its reverse (100110212201122), we get a palindrome (321212424212123).

The spelling of 221102212011001 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twelve million, eleven thousand, one".