12020400401 has 2 divisors, whose sum is σ = 12020400402. Its totient is φ = 12020400400.

The previous prime is 12020400397. The next prime is 12020400421. The reversal of 12020400401 is 10400402021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9300673600 + 2719726801 = 96440^2 + 52151^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020400401 - 2² = 12020400397 is a prime.

It is not a weakly prime, because it can be changed into another prime (12020400421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010200200 + 6010200201.

It is an arithmetic number, because the mean of its divisors is an integer number (6010200201).

Almost surely, 2^12020400401 is an apocalyptic number.

It is an amenable number.

12020400401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020400401 is an equidigital number, since it uses as much as digits as its factorization.

12020400401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12020400401 its reverse (10400402021), we get a palindrome (22420802422).

The spelling of 12020400401 in words is "twelve billion, twenty million, four hundred thousand, four hundred one".