221112020121001 has 4 divisors (see below), whose sum is σ = 221822991247104. Its totient is φ = 220401048994900.

The previous prime is 221112020120989. The next prime is 221112020121017. The reversal of 221112020121001 is 100121020211122.

221112020121001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-221112020121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221112020121071) 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, 355485562585 + ... + 355485563206.

It is an arithmetic number, because the mean of its divisors is an integer number (55455747811776).

Almost surely, 2^{221112020121001} is an apocalyptic number.

It is an amenable number.

221112020121001 is a deficient number, since it is larger than the sum of its proper divisors (710971126103).

221112020121001 is an equidigital number, since it uses as much as digits as its factorization.

221112020121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710971126102.

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

Adding to 221112020121001 its reverse (100121020211122), we get a palindrome (321233040332123).

The spelling of 221112020121001 in words is "two hundred twenty-one trillion, one hundred twelve billion, twenty million, one hundred twenty-one thousand, one".