2101505001 has 8 divisors (see below), whose sum is σ = 2812347264. Its totient is φ = 1395833040.

The previous prime is 2101504969. The next prime is 2101505053. The reversal of 2101505001 is 1005051012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2101505001 - 2⁵ = 2101504969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2101505071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291626 + ... + 1293251.

It is an arithmetic number, because the mean of its divisors is an integer number (351543408).

Almost surely, 2^2101505001 is an apocalyptic number.

It is an amenable number.

2101505001 is a deficient number, since it is larger than the sum of its proper divisors (710842263).

2101505001 is a wasteful number, since it uses less digits than its factorization.

2101505001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585151.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 2101505001 is about 45842.1749156822. The cubic root of 2101505001 is about 1280.8850082736.

Adding to 2101505001 its reverse (1005051012), we get a palindrome (3106556013).

The spelling of 2101505001 in words is "two billion, one hundred one million, five hundred five thousand, one".