221131441213 has 4 divisors (see below), whose sum is σ = 221635157920. Its totient is φ = 220627724508.

The previous prime is 221131441189. The next prime is 221131441249. The reversal of 221131441213 is 312144131122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312144131122 = 2 ⋅156072065561.

It is a cyclic number.

It is not a de Polignac number, because 221131441213 - 2¹³ = 221131433021 is a prime.

It is a super-2 number, since 2×221131441213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131441273) 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, 251857695 + ... + 251858572.

It is an arithmetic number, because the mean of its divisors is an integer number (55408789480).

Almost surely, 2^221131441213 is an apocalyptic number.

It is an amenable number.

221131441213 is a deficient number, since it is larger than the sum of its proper divisors (503716707).

221131441213 is an equidigital number, since it uses as much as digits as its factorization.

221131441213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503716706.

The product of its digits is 1152, while the sum is 25.

Adding to 221131441213 its reverse (312144131122), we get a palindrome (533275572335).

The spelling of 221131441213 in words is "two hundred twenty-one billion, one hundred thirty-one million, four hundred forty-one thousand, two hundred thirteen".