221001131413 has 4 divisors (see below), whose sum is σ = 221118127020. Its totient is φ = 220884135808.

The previous prime is 221001131369. The next prime is 221001131453. The reversal of 221001131413 is 314131100122.

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 78342330609 + 142658800804 = 279897^2 + 377702^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001131413 - 2⁹ = 221001130901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001131453) 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, 58494970 + ... + 58498747.

It is an arithmetic number, because the mean of its divisors is an integer number (55279531755).

Almost surely, 2^221001131413 is an apocalyptic number.

It is an amenable number.

221001131413 is a deficient number, since it is larger than the sum of its proper divisors (116995607).

221001131413 is a wasteful number, since it uses less digits than its factorization.

221001131413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116995606.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221001131413 its reverse (314131100122), we get a palindrome (535132231535).

The spelling of 221001131413 in words is "two hundred twenty-one billion, one million, one hundred thirty-one thousand, four hundred thirteen".