221202113401 has 4 divisors (see below), whose sum is σ = 224232279412. Its totient is φ = 218171947392.

The previous prime is 221202113387. The next prime is 221202113441. The reversal of 221202113401 is 104311202122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73577105001 + 147625008400 = 271251^2 + 384220^2 .

It is a cyclic number.

It is not a de Polignac number, because 221202113401 - 2⁵ = 221202113369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221202113441) 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, 1515082896 + ... + 1515083041.

It is an arithmetic number, because the mean of its divisors is an integer number (56058069853).

Almost surely, 2^221202113401 is an apocalyptic number.

It is an amenable number.

221202113401 is a deficient number, since it is larger than the sum of its proper divisors (3030166011).

221202113401 is an equidigital number, since it uses as much as digits as its factorization.

221202113401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030166010.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221202113401 its reverse (104311202122), we get a palindrome (325513315523).

The spelling of 221202113401 in words is "two hundred twenty-one billion, two hundred two million, one hundred thirteen thousand, four hundred one".