420110111211421 has 2 divisors, whose sum is σ = 420110111211422. Its totient is φ = 420110111211420.

The previous prime is 420110111211403. The next prime is 420110111211437. The reversal of 420110111211421 is 124112111011024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272371288505625 + 147738822705796 = 16503675^2 + 12154786^2 .

It is a cyclic number.

It is not a de Polignac number, because 420110111211421 - 2²⁵ = 420110077656989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420110111211392 and 420110111211401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420110111211451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210055055605710 + 210055055605711.

It is an arithmetic number, because the mean of its divisors is an integer number (210055055605711).

Almost surely, 2^{420110111211421} is an apocalyptic number.

It is an amenable number.

420110111211421 is a deficient number, since it is larger than the sum of its proper divisors (1).

420110111211421 is an equidigital number, since it uses as much as digits as its factorization.

420110111211421 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 22.

Adding to 420110111211421 its reverse (124112111011024), we get a palindrome (544222222222445).

The spelling of 420110111211421 in words is "four hundred twenty trillion, one hundred ten billion, one hundred eleven million, two hundred eleven thousand, four hundred twenty-one".