2101230101 has 4 divisors (see below), whose sum is σ = 2102499852. Its totient is φ = 2099960352.

The previous prime is 2101230091. The next prime is 2101230133. The reversal of 2101230101 is 1010321012.

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 864301201 + 1236928900 = 29399^2 + 35170^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101230101 - 2¹⁰ = 2101229077 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101230181) 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, 632390 + ... + 635703.

It is an arithmetic number, because the mean of its divisors is an integer number (525624963).

Almost surely, 2^2101230101 is an apocalyptic number.

It is an amenable number.

2101230101 is a deficient number, since it is larger than the sum of its proper divisors (1269751).

2101230101 is a wasteful number, since it uses less digits than its factorization.

2101230101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269750.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2101230101 is about 45839.1764869309. The cubic root of 2101230101 is about 1280.8291545492.

Adding to 2101230101 its reverse (1010321012), we get a palindrome (3111551113).

The spelling of 2101230101 in words is "two billion, one hundred one million, two hundred thirty thousand, one hundred one".