200621130401 has 4 divisors (see below), whose sum is σ = 200623849092. Its totient is φ = 200618411712.

The previous prime is 200621130379. The next prime is 200621130419. The reversal of 200621130401 is 104031126002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80628170401 + 119992960000 = 283951^2 + 346400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200621130401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (200621130301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245476 + ... + 1397301.

It is an arithmetic number, because the mean of its divisors is an integer number (50155962273).

Almost surely, 2^200621130401 is an apocalyptic number.

It is an amenable number.

200621130401 is a deficient number, since it is larger than the sum of its proper divisors (2718691).

200621130401 is an equidigital number, since it uses as much as digits as its factorization.

200621130401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718690.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 200621130401 its reverse (104031126002), we get a palindrome (304652256403).

The spelling of 200621130401 in words is "two hundred billion, six hundred twenty-one million, one hundred thirty thousand, four hundred one".