1111101112421 has 2 divisors, whose sum is σ = 1111101112422. Its totient is φ = 1111101112420.

The previous prime is 1111101112417. The next prime is 1111101112441. The reversal of 1111101112421 is 1242111011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062107503396 + 48993609025 = 1030586^2 + 221345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111101112421 - 2² = 1111101112417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111101112421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111101112441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555550556210 + 555550556211.

It is an arithmetic number, because the mean of its divisors is an integer number (555550556211).

Almost surely, 2^{1111101112421} is an apocalyptic number.

It is an amenable number.

1111101112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111101112421 is an equidigital number, since it uses as much as digits as its factorization.

1111101112421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 1111101112421 its reverse (1242111011111), we get a palindrome (2353212123532).

The spelling of 1111101112421 in words is "one trillion, one hundred eleven billion, one hundred one million, one hundred twelve thousand, four hundred twenty-one".