111221211220023 has 8 divisors (see below), whose sum is σ = 148295582787328. Its totient is φ = 74147156899704.

The previous prime is 111221211220013. The next prime is 111221211220027. The reversal of 111221211220023 is 320022112122111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111221211220023 - 2⁵ = 111221211219991 is a prime.

It is a super-2 number, since 2×111221211220023² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221211220027) 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 7 ways as a sum of consecutive naturals, for example, 78492511 + ... + 79896912.

It is an arithmetic number, because the mean of its divisors is an integer number (18536947848416).

Almost surely, 2^{111221211220023} is an apocalyptic number.

111221211220023 is a deficient number, since it is larger than the sum of its proper divisors (37074371567305).

111221211220023 is a wasteful number, since it uses less digits than its factorization.

111221211220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158623493.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 111221211220023 its reverse (320022112122111), we get a palindrome (431243323342134).

The spelling of 111221211220023 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, twenty-three".