220113503502421 has 4 divisors (see below), whose sum is σ = 220113603103212. Its totient is φ = 220113403901632.

The previous prime is 220113503502413. The next prime is 220113503502509. The reversal of 220113503502421 is 124205305311022.

It is a happy number.

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 71815031640625 + 148298471861796 = 8474375^2 + 12177786^2 .

It is a cyclic number.

It is not a de Polignac number, because 220113503502421 - 2³ = 220113503502413 is a prime.

It is a super-2 number, since 2×220113503502421² (a number of 29 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 (220113503502821) 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, 46408450 + ... + 50931043.

It is an arithmetic number, because the mean of its divisors is an integer number (55028400775803).

Almost surely, 2^{220113503502421} is an apocalyptic number.

It is an amenable number.

220113503502421 is a deficient number, since it is larger than the sum of its proper divisors (99600791).

220113503502421 is an equidigital number, since it uses as much as digits as its factorization.

220113503502421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99600790.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 220113503502421 its reverse (124205305311022), we get a palindrome (344318808813443).

The spelling of 220113503502421 in words is "two hundred twenty trillion, one hundred thirteen billion, five hundred three million, five hundred two thousand, four hundred twenty-one".