2101203001 has 4 divisors (see below), whose sum is σ = 2106194404. Its totient is φ = 2096211600.

The previous prime is 2101202993. The next prime is 2101203031. The reversal of 2101203001 is 1003021012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1108890000 + 992313001 = 33300^2 + 31501^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101203001 - 2³ = 2101202993 is a prime.

It is a super-2 number, since 2×2101203001² = 8830108102822812002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101203031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2495070 + ... + 2495911.

It is an arithmetic number, because the mean of its divisors is an integer number (526548601).

Almost surely, 2^2101203001 is an apocalyptic number.

It is an amenable number.

2101203001 is a deficient number, since it is larger than the sum of its proper divisors (4991403).

2101203001 is an equidigital number, since it uses as much as digits as its factorization.

2101203001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991402.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2101203001 is about 45838.8808872992. The cubic root of 2101203001 is about 1280.8236481526.

Adding to 2101203001 its reverse (1003021012), we get a palindrome (3104224013).

The spelling of 2101203001 in words is "two billion, one hundred one million, two hundred three thousand, one".