200102001 has 32 divisors (see below), whose sum is σ = 314219520. Its totient is φ = 111988800.

The previous prime is 200101963. The next prime is 200102003. The reversal of 200102001 is 100201002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-200102001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200102003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17466 + ... + 26556.

It is an arithmetic number, because the mean of its divisors is an integer number (9819360).

Almost surely, 2^200102001 is an apocalyptic number.

It is an amenable number.

200102001 is a deficient number, since it is larger than the sum of its proper divisors (114117519).

200102001 is a wasteful number, since it uses less digits than its factorization.

200102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 200102001 is about 14145.7414439824. The cubic root of 200102001 is about 584.9029483240.

Adding to 200102001 its reverse (100201002), we get a palindrome (300303003).

Subtracting from 200102001 its reverse (100201002), we obtain a palindrome (99900999).

It can be divided in two parts, 200 and 102001, that added together give a palindrome (102201).

The spelling of 200102001 in words is "two hundred million, one hundred two thousand, one".