2181013201 has 4 divisors (see below), whose sum is σ = 2192084532. Its totient is φ = 2169941872.

The previous prime is 2181013141. The next prime is 2181013217. The reversal of 2181013201 is 1023101812.

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 2132222976 + 48790225 = 46176^2 + 6985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181013201 - 2⁹ = 2181012689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181013271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535370 + ... + 5535763.

It is an arithmetic number, because the mean of its divisors is an integer number (548021133).

Almost surely, 2^2181013201 is an apocalyptic number.

It is an amenable number.

2181013201 is a deficient number, since it is larger than the sum of its proper divisors (11071331).

2181013201 is a wasteful number, since it uses less digits than its factorization.

2181013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071330.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 2181013201 is about 46701.3190498941. The cubic root of 2181013201 is about 1296.8391058579.

The spelling of 2181013201 in words is "two billion, one hundred eighty-one million, thirteen thousand, two hundred one".