221433312443131 has 16 divisors (see below), whose sum is σ = 234858288102624. Its totient is φ = 208052773461504.

The previous prime is 221433312443117. The next prime is 221433312443183. The reversal of 221433312443131 is 131344213334122.

It is a happy number.

It is not a de Polignac number, because 221433312443131 - 2²¹ = 221433310345979 is a prime.

It is a super-2 number, since 2×221433312443131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221433310443131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144433260 + ... + 145958326.

It is an arithmetic number, because the mean of its divisors is an integer number (14678643006414).

Almost surely, 2^{221433312443131} is an apocalyptic number.

221433312443131 is a deficient number, since it is larger than the sum of its proper divisors (13424975659493).

221433312443131 is a wasteful number, since it uses less digits than its factorization.

221433312443131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539630.

The product of its digits is 124416, while the sum is 37.

Adding to 221433312443131 its reverse (131344213334122), we get a palindrome (352777525777253).

The spelling of 221433312443131 in words is "two hundred twenty-one trillion, four hundred thirty-three billion, three hundred twelve million, four hundred forty-three thousand, one hundred thirty-one".