201020001 has 48 divisors (see below), whose sum is σ = 344965824. Its totient is φ = 103130496.

The previous prime is 201019999. The next prime is 201020009. The reversal of 201020001 is 100020102.

It is a happy number.

It is not a de Polignac number, because 201020001 - 2¹ = 201019999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201020009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69286 + ... + 72128.

It is an arithmetic number, because the mean of its divisors is an integer number (7186788).

Almost surely, 2^201020001 is an apocalyptic number.

201020001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201020001 is a deficient number, since it is larger than the sum of its proper divisors (143945823).

201020001 is a wasteful number, since it uses less digits than its factorization.

201020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910 (or 2903 counting only the distinct ones).

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

The square root of 201020001 is about 14178.1522420942. The cubic root of 201020001 is about 585.7960293350.

Adding to 201020001 its reverse (100020102), we get a palindrome (301040103).

The spelling of 201020001 in words is "two hundred one million, twenty thousand, one".