111201021321 has 12 divisors (see below), whose sum is σ = 160550587728. Its totient is φ = 68431397424.

The previous prime is 111201021313. The next prime is 111201021377. The reversal of 111201021321 is 123120102111.

It is not a de Polignac number, because 111201021321 - 2³ = 111201021313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111201021321.

It is not an unprimeable number, because it can be changed into a prime (111201021301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109665195 + ... + 109666208.

It is an arithmetic number, because the mean of its divisors is an integer number (13379215644).

Almost surely, 2^111201021321 is an apocalyptic number.

It is an amenable number.

111201021321 is a deficient number, since it is larger than the sum of its proper divisors (49349566407).

111201021321 is a wasteful number, since it uses less digits than its factorization.

111201021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219331432 (or 219331419 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 111201021321 its reverse (123120102111), we get a palindrome (234321123432).

The spelling of 111201021321 in words is "one hundred eleven billion, two hundred one million, twenty-one thousand, three hundred twenty-one".