213122302123 has 4 divisors (see below), whose sum is σ = 213584606928. Its totient is φ = 212659997320.

The previous prime is 213122302117. The next prime is 213122302157. The reversal of 213122302123 is 321203221312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213122302123 - 2⁹ = 213122301611 is a prime.

It is a super-2 number, since 2×213122302123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213122302094 and 213122302103.

It is not an unprimeable number, because it can be changed into a prime (213122303123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231151711 + ... + 231152632.

It is an arithmetic number, because the mean of its divisors is an integer number (53396151732).

Almost surely, 2^213122302123 is an apocalyptic number.

213122302123 is a deficient number, since it is larger than the sum of its proper divisors (462304805).

213122302123 is an equidigital number, since it uses as much as digits as its factorization.

213122302123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462304804.

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

Adding to 213122302123 its reverse (321203221312), we get a palindrome (534325523435).

The spelling of 213122302123 in words is "two hundred thirteen billion, one hundred twenty-two million, three hundred two thousand, one hundred twenty-three".