1641200101 has 4 divisors (see below), whose sum is σ = 1641300192. Its totient is φ = 1641100012.

The previous prime is 1641200063. The next prime is 1641200117. The reversal of 1641200101 is 1010021461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641200101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641200401) 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 in 3 ways as a sum of consecutive naturals, for example, 19051 + ... + 60376.

It is an arithmetic number, because the mean of its divisors is an integer number (410325048).

Almost surely, 2^1641200101 is an apocalyptic number.

It is an amenable number.

1641200101 is a deficient number, since it is larger than the sum of its proper divisors (100091).

1641200101 is an equidigital number, since it uses as much as digits as its factorization.

1641200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100090.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1641200101 is about 40511.7279438930. The cubic root of 1641200101 is about 1179.5612898000.

Adding to 1641200101 its reverse (1010021461), we get a palindrome (2651221562).

The spelling of 1641200101 in words is "one billion, six hundred forty-one million, two hundred thousand, one hundred one".