1001200101 has 24 divisors (see below), whose sum is σ = 1485939840. Its totient is φ = 599089920.

The previous prime is 1001200099. The next prime is 1001200111. The reversal of 1001200101 is 1010021001.

It is not a de Polignac number, because 1001200101 - 2¹ = 1001200099 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001200111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11221 + ... + 46133.

It is an arithmetic number, because the mean of its divisors is an integer number (61914160).

Almost surely, 2^1001200101 is an apocalyptic number.

1001200101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001200101 is a deficient number, since it is larger than the sum of its proper divisors (484739739).

1001200101 is a wasteful number, since it uses less digits than its factorization.

1001200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35017 (or 35006 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1001200101 is about 31641.7461749506. The cubic root of 1001200101 is about 1000.3998737463.

Adding to 1001200101 its reverse (1010021001), we get a palindrome (2011221102).

Subtracting 1001200101 from its reverse (1010021001), we obtain a square (8820900 = 2970²).

It can be divided in two parts, 1001 and 200101, that added together give a palindrome (201102).

The spelling of 1001200101 in words is "one billion, one million, two hundred thousand, one hundred one".