213031014123 has 4 divisors (see below), whose sum is σ = 284041352168. Its totient is φ = 142020676080.

The previous prime is 213031014121. The next prime is 213031014139. The reversal of 213031014123 is 321410130312.

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

It is not a de Polignac number, because 213031014123 - 2¹ = 213031014121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213031014123.

It is not an unprimeable number, because it can be changed into a prime (213031014121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35505169018 + ... + 35505169023.

It is an arithmetic number, because the mean of its divisors is an integer number (71010338042).

Almost surely, 2^213031014123 is an apocalyptic number.

213031014123 is a deficient number, since it is larger than the sum of its proper divisors (71010338045).

213031014123 is an equidigital number, since it uses as much as digits as its factorization.

213031014123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71010338044.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213031014123 its reverse (321410130312), we get a palindrome (534441144435).

The spelling of 213031014123 in words is "two hundred thirteen billion, thirty-one million, fourteen thousand, one hundred twenty-three".