111300020521 has 16 divisors (see below), whose sum is σ = 118691887104. Its totient is φ = 104124003984.

The previous prime is 111300020497. The next prime is 111300020569. The reversal of 111300020521 is 125020003111.

It is not a de Polignac number, because 111300020521 - 2¹⁵ = 111299987753 is a prime.

It is a super-2 number, since 2×111300020521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111300020495 and 111300020504.

It is not an unprimeable number, because it can be changed into a prime (111300023521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1568410 + ... + 1637836.

It is an arithmetic number, because the mean of its divisors is an integer number (7418242944).

Almost surely, 2^111300020521 is an apocalyptic number.

It is an amenable number.

111300020521 is a deficient number, since it is larger than the sum of its proper divisors (7391866583).

111300020521 is a wasteful number, since it uses less digits than its factorization.

111300020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70980.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 111300020521 its reverse (125020003111), we get a palindrome (236320023632).

The spelling of 111300020521 in words is "one hundred eleven billion, three hundred million, twenty thousand, five hundred twenty-one".