221011002110001 has 4 divisors (see below), whose sum is σ = 294681336146672. Its totient is φ = 147340668073332.

The previous prime is 221011002109999. The next prime is 221011002110027. The reversal of 221011002110001 is 100011200110122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221011002110001 - 2¹ = 221011002109999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221011002110051) 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, 36835167018331 + ... + 36835167018336.

It is an arithmetic number, because the mean of its divisors is an integer number (73670334036668).

Almost surely, 2^{221011002110001} is an apocalyptic number.

It is an amenable number.

221011002110001 is a deficient number, since it is larger than the sum of its proper divisors (73670334036671).

221011002110001 is an equidigital number, since it uses as much as digits as its factorization.

221011002110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73670334036670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221011002110001 its reverse (100011200110122), we get a palindrome (321022202220123).

The spelling of 221011002110001 in words is "two hundred twenty-one trillion, eleven billion, two million, one hundred ten thousand, one".