402120100201 has 2 divisors, whose sum is σ = 402120100202. Its totient is φ = 402120100200.

The previous prime is 402120100189. The next prime is 402120100241. The reversal of 402120100201 is 102001021204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241767906601 + 160352193600 = 491699^2 + 400440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402120100201 is a prime.

It is not a weakly prime, because it can be changed into another prime (402120100241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201060050100 + 201060050101.

It is an arithmetic number, because the mean of its divisors is an integer number (201060050101).

Almost surely, 2^402120100201 is an apocalyptic number.

It is an amenable number.

402120100201 is a deficient number, since it is larger than the sum of its proper divisors (1).

402120100201 is an equidigital number, since it uses as much as digits as its factorization.

402120100201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 402120100201 its reverse (102001021204), we get a palindrome (504121121405).

The spelling of 402120100201 in words is "four hundred two billion, one hundred twenty million, one hundred thousand, two hundred one".