213202231109 has 6 divisors (see below), whose sum is σ = 248010758694. Its totient is φ = 182744769480.

The previous prime is 213202231051. The next prime is 213202231133. The reversal of 213202231109 is 901132202312.

It can be written as a sum of positive squares in only one way, i.e., 153362308225 + 59839922884 = 391615^2 + 244622^2 .

It is not a de Polignac number, because 213202231109 - 2³² = 208907263813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213202231169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2175532922 + ... + 2175533019.

It is an arithmetic number, because the mean of its divisors is an integer number (41335126449).

Almost surely, 2^213202231109 is an apocalyptic number.

It is an amenable number.

213202231109 is a deficient number, since it is larger than the sum of its proper divisors (34808527585).

213202231109 is an equidigital number, since it uses as much as digits as its factorization.

213202231109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351065955 (or 4351065948 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 213202231109 in words is "two hundred thirteen billion, two hundred two million, two hundred thirty-one thousand, one hundred nine".