221021012201 has 16 divisors (see below), whose sum is σ = 249192972288. Its totient is φ = 194211267600.

The previous prime is 221021012161. The next prime is 221021012203. The reversal of 221021012201 is 102210120122.

It is not a de Polignac number, because 221021012201 - 2⁶ = 221021012137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221021012203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109865 + ... + 673878.

It is an arithmetic number, because the mean of its divisors is an integer number (15574560768).

Almost surely, 2^221021012201 is an apocalyptic number.

It is an amenable number.

221021012201 is a deficient number, since it is larger than the sum of its proper divisors (28171960087).

221021012201 is a wasteful number, since it uses less digits than its factorization.

221021012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784612.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221021012201 its reverse (102210120122), we get a palindrome (323231132323).

The spelling of 221021012201 in words is "two hundred twenty-one billion, twenty-one million, twelve thousand, two hundred one".