111552140221 has 4 divisors (see below), whose sum is σ = 111553975872. Its totient is φ = 111550304572.

The previous prime is 111552140213. The next prime is 111552140257. The reversal of 111552140221 is 122041255111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122041255111 = 31 ⋅3936814681.

It is a cyclic number.

It is not a de Polignac number, because 111552140221 - 2³ = 111552140213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111552140291) 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, 823435 + ... + 949288.

It is an arithmetic number, because the mean of its divisors is an integer number (27888493968).

Almost surely, 2^111552140221 is an apocalyptic number.

It is an amenable number.

111552140221 is a deficient number, since it is larger than the sum of its proper divisors (1835651).

111552140221 is an equidigital number, since it uses as much as digits as its factorization.

111552140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835650.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 111552140221 its reverse (122041255111), we get a palindrome (233593395332).

The spelling of 111552140221 in words is "one hundred eleven billion, five hundred fifty-two million, one hundred forty thousand, two hundred twenty-one".