111211221023 has 8 divisors (see below), whose sum is σ = 127208780448. Its totient is φ = 95241222144.

The previous prime is 111211220987. The next prime is 111211221067. The reversal of 111211221023 is 320122112111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111211221023 - 2³⁴ = 94031351839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211220992 and 111211221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211221073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6881486 + ... + 6897627.

It is an arithmetic number, because the mean of its divisors is an integer number (15901097556).

Almost surely, 2^111211221023 is an apocalyptic number.

111211221023 is a deficient number, since it is larger than the sum of its proper divisors (15997559425).

111211221023 is a wasteful number, since it uses less digits than its factorization.

111211221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13780273.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111211221023 its reverse (320122112111), we get a palindrome (431333333134).

The spelling of 111211221023 in words is "one hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand, twenty-three".