1112111203421 has 2 divisors, whose sum is σ = 1112111203422. Its totient is φ = 1112111203420.

The previous prime is 1112111203417. The next prime is 1112111203433. The reversal of 1112111203421 is 1243021112111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640432072900 + 471679130521 = 800270^2 + 686789^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112111203421 - 2² = 1112111203417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1112111203393 and 1112111203402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112111203121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556055601710 + 556055601711.

It is an arithmetic number, because the mean of its divisors is an integer number (556055601711).

Almost surely, 2^{1112111203421} is an apocalyptic number.

It is an amenable number.

1112111203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112111203421 is an equidigital number, since it uses as much as digits as its factorization.

1112111203421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 1112111203421 its reverse (1243021112111), we get a palindrome (2355132315532).

The spelling of 1112111203421 in words is "one trillion, one hundred twelve billion, one hundred eleven million, two hundred three thousand, four hundred twenty-one".