221245043131 has 8 divisors (see below), whose sum is σ = 252855864800. Its totient is φ = 189635318208.

The previous prime is 221245043119. The next prime is 221245043161. The reversal of 221245043131 is 131340542122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221245043131 - 2¹⁹ = 221244518843 is a prime.

It is a super-2 number, since 2×221245043131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221245043131.

It is not an unprimeable number, because it can be changed into a prime (221245043161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216685 + ... + 699601.

It is an arithmetic number, because the mean of its divisors is an integer number (31606983100).

Almost surely, 2^221245043131 is an apocalyptic number.

221245043131 is a deficient number, since it is larger than the sum of its proper divisors (31610821669).

221245043131 is an equidigital number, since it uses as much as digits as its factorization.

221245043131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548373.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 221245043131 its reverse (131340542122), we get a palindrome (352585585253).

The spelling of 221245043131 in words is "two hundred twenty-one billion, two hundred forty-five million, forty-three thousand, one hundred thirty-one".