213201322123 has 16 divisors (see below), whose sum is σ = 234542200320. Its totient is φ = 192899589696.

The previous prime is 213201322069. The next prime is 213201322157. The reversal of 213201322123 is 321223102312.

It is not a de Polignac number, because 213201322123 - 2¹⁷ = 213201191051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213201322094 and 213201322103.

It is not an unprimeable number, because it can be changed into a prime (213201322823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94290 + ... + 659767.

It is an arithmetic number, because the mean of its divisors is an integer number (14658887520).

Almost surely, 2^213201322123 is an apocalyptic number.

213201322123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213201322123 is a deficient number, since it is larger than the sum of its proper divisors (21340878197).

213201322123 is a wasteful number, since it uses less digits than its factorization.

213201322123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754746.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 213201322123 its reverse (321223102312), we get a palindrome (534424424435).

The spelling of 213201322123 in words is "two hundred thirteen billion, two hundred one million, three hundred twenty-two thousand, one hundred twenty-three".