420121211401 has 2 divisors, whose sum is σ = 420121211402. Its totient is φ = 420121211400.

The previous prime is 420121211317. The next prime is 420121211407. The reversal of 420121211401 is 104112121024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389469605625 + 30651605776 = 624075^2 + 175076^2 .

It is a cyclic number.

It is not a de Polignac number, because 420121211401 - 2⁷ = 420121211273 is a prime.

It is not a weakly prime, because it can be changed into another prime (420121211407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210060605700 + 210060605701.

It is an arithmetic number, because the mean of its divisors is an integer number (210060605701).

Almost surely, 2^420121211401 is an apocalyptic number.

It is an amenable number.

420121211401 is a deficient number, since it is larger than the sum of its proper divisors (1).

420121211401 is an equidigital number, since it uses as much as digits as its factorization.

420121211401 is an odious number, because the sum of its binary digits is odd.

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

Adding to 420121211401 its reverse (104112121024), we get a palindrome (524233332425).

The spelling of 420121211401 in words is "four hundred twenty billion, one hundred twenty-one million, two hundred eleven thousand, four hundred one".