111230021021 has 48 divisors (see below), whose sum is σ = 138595691520. Its totient is φ = 88693678080.

The previous prime is 111230021009. The next prime is 111230021053. The reversal of 111230021021 is 120120032111.

It is not a de Polignac number, because 111230021021 - 2²² = 111225826717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111230020987 and 111230021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111230021621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25931645 + ... + 25935933.

It is an arithmetic number, because the mean of its divisors is an integer number (2887410240).

Almost surely, 2^111230021021 is an apocalyptic number.

It is an amenable number.

111230021021 is a deficient number, since it is larger than the sum of its proper divisors (27365670499).

111230021021 is a wasteful number, since it uses less digits than its factorization.

111230021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4674 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 111230021021 its reverse (120120032111), we get a palindrome (231350053132).

The spelling of 111230021021 in words is "one hundred eleven billion, two hundred thirty million, twenty-one thousand, twenty-one".