221001022112201 has 4 divisors (see below), whose sum is σ = 221017140645504. Its totient is φ = 220984903578900.

The previous prime is 221001022112197. The next prime is 221001022112219. The reversal of 221001022112201 is 102211220100122.

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 a cyclic number.

It is not a de Polignac number, because 221001022112201 - 2² = 221001022112197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221001022112201.

It is not an unprimeable number, because it can be changed into a prime (221001022112701) 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, 8059246085 + ... + 8059273506.

It is an arithmetic number, because the mean of its divisors is an integer number (55254285161376).

Almost surely, 2^{221001022112201} is an apocalyptic number.

It is an amenable number.

221001022112201 is a deficient number, since it is larger than the sum of its proper divisors (16118533303).

221001022112201 is a wasteful number, since it uses less digits than its factorization.

221001022112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16118533302.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221001022112201 its reverse (102211220100122), we get a palindrome (323212242212323).

The spelling of 221001022112201 in words is "two hundred twenty-one trillion, one billion, twenty-two million, one hundred twelve thousand, two hundred one".