213010023121 has 12 divisors (see below), whose sum is σ = 247854404388. Its totient is φ = 182530478592.

The previous prime is 213010023047. The next prime is 213010023133. The reversal of 213010023121 is 121320010312.

It can be written as a sum of positive squares in 2 ways, for example, as 72340019521 + 140670003600 = 268961^2 + 375060^2 .

It is not a de Polignac number, because 213010023121 - 2¹¹ = 213010021073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213010023095 and 213010023104.

It is not an unprimeable number, because it can be changed into a prime (213010023221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406776 + ... + 769081.

It is an arithmetic number, because the mean of its divisors is an integer number (20654533699).

Almost surely, 2^213010023121 is an apocalyptic number.

It is an amenable number.

213010023121 is a deficient number, since it is larger than the sum of its proper divisors (34844381267).

213010023121 is a wasteful number, since it uses less digits than its factorization.

213010023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179568 (or 1179561 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 213010023121 its reverse (121320010312), we get a palindrome (334330033433).

The spelling of 213010023121 in words is "two hundred thirteen billion, ten million, twenty-three thousand, one hundred twenty-one".