2101000401 has 24 divisors (see below), whose sum is σ = 3115734336. Its totient is φ = 1363708320.

The previous prime is 2101000393. The next prime is 2101000453. The reversal of 2101000401 is 1040001012.

It is a happy number.

It is not a de Polignac number, because 2101000401 - 2³ = 2101000393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2101000501) 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, 45676 + ... + 79298.

It is an arithmetic number, because the mean of its divisors is an integer number (129822264).

Almost surely, 2^2101000401 is an apocalyptic number.

It is an amenable number.

2101000401 is a deficient number, since it is larger than the sum of its proper divisors (1014733935).

2101000401 is a wasteful number, since it uses less digits than its factorization.

2101000401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33813 (or 33810 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2101000401 is about 45836.6709196905. The cubic root of 2101000401 is about 1280.7824807496.

Adding to 2101000401 its reverse (1040001012), we get a palindrome (3141001413).

The spelling of 2101000401 in words is "two billion, one hundred one million, four hundred one", and thus it is an aban number.