111211421333 has 4 divisors (see below), whose sum is σ = 111787646508. Its totient is φ = 110635196160.

The previous prime is 111211421309. The next prime is 111211421359. The reversal of 111211421333 is 333124112111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 333124112111 = 7 ⋅47589158873.

It can be written as a sum of positive squares in 2 ways, for example, as 22072153489 + 89139267844 = 148567^2 + 298562^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211421333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211421299 and 111211421308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211421383) 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, 288112298 + ... + 288112683.

It is an arithmetic number, because the mean of its divisors is an integer number (27946911627).

Almost surely, 2^111211421333 is an apocalyptic number.

It is an amenable number.

111211421333 is a deficient number, since it is larger than the sum of its proper divisors (576225175).

111211421333 is an equidigital number, since it uses as much as digits as its factorization.

111211421333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576225174.

The product of its digits is 432, while the sum is 23.

Adding to 111211421333 its reverse (333124112111), we get a palindrome (444335533444).

The spelling of 111211421333 in words is "one hundred eleven billion, two hundred eleven million, four hundred twenty-one thousand, three hundred thirty-three".