111630160321 has 9 divisors (see below), whose sum is σ = 112196656611. Its totient is φ = 111066515064.

The previous prime is 111630160319. The next prime is 111630160331. The reversal of 111630160321 is 123061036111.

The square root of 111630160321 is 334111.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 103966908721 + 7663251600 = 322439^2 + 87540^2 .

It is not a de Polignac number, because 111630160321 - 2¹ = 111630160319 is a prime.

It is a super-2 number, since 2×111630160321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111630160331) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76510690 + ... + 76512148.

It is an arithmetic number, because the mean of its divisors is an integer number (12466295179).

Almost surely, 2^111630160321 is an apocalyptic number.

111630160321 is the 334111-st square number.

111630160321 is the 167056-th centered octagonal number.

It is an amenable number.

111630160321 is a deficient number, since it is larger than the sum of its proper divisors (566496290).

111630160321 is an frugal number, since it uses more digits than its factorization.

111630160321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

Multiplying 111630160321 by its sum of digits (25), we get a square (2790754008025 = 1670555²).

Adding to 111630160321 its reverse (123061036111), we get a palindrome (234691196432).

The spelling of 111630160321 in words is "one hundred eleven billion, six hundred thirty million, one hundred sixty thousand, three hundred twenty-one".