221420012201 has 4 divisors (see below), whose sum is σ = 223163476992. Its totient is φ = 219676547412.

The previous prime is 221420012113. The next prime is 221420012213. The reversal of 221420012201 is 102210024122.

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 221420012201 - 2¹⁰ = 221420011177 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 221420012201.

It is not an unprimeable number, because it can be changed into a prime (221420017201) 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, 871732205 + ... + 871732458.

It is an arithmetic number, because the mean of its divisors is an integer number (55790869248).

Almost surely, 2^221420012201 is an apocalyptic number.

It is an amenable number.

221420012201 is a deficient number, since it is larger than the sum of its proper divisors (1743464791).

221420012201 is a wasteful number, since it uses less digits than its factorization.

221420012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743464790.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221420012201 its reverse (102210024122), we get a palindrome (323630036323).

The spelling of 221420012201 in words is "two hundred twenty-one billion, four hundred twenty million, twelve thousand, two hundred one".