1112220021421 has 2 divisors, whose sum is σ = 1112220021422. Its totient is φ = 1112220021420.

The previous prime is 1112220021403. The next prime is 1112220021433. The reversal of 1112220021421 is 1241200222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630299439396 + 481920582025 = 793914^2 + 694205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112220021421 - 2¹¹ = 1112220019373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112220021461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556110010710 + 556110010711.

It is an arithmetic number, because the mean of its divisors is an integer number (556110010711).

Almost surely, 2^{1112220021421} is an apocalyptic number.

It is an amenable number.

1112220021421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112220021421 is an equidigital number, since it uses as much as digits as its factorization.

1112220021421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1112220021421 its reverse (1241200222111), we get a palindrome (2353420243532).

The spelling of 1112220021421 in words is "one trillion, one hundred twelve billion, two hundred twenty million, twenty-one thousand, four hundred twenty-one".