213012230123 has 32 divisors (see below), whose sum is σ = 271419310080. Its totient is φ = 162335129760.

The previous prime is 213012230089. The next prime is 213012230131. The reversal of 213012230123 is 321032210312.

It is a cyclic number.

It is not a de Polignac number, because 213012230123 - 2⁶ = 213012230059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213012230095 and 213012230104.

It is not an unprimeable number, because it can be changed into a prime (213012230173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5187290 + ... + 5228192.

It is an arithmetic number, because the mean of its divisors is an integer number (8481853440).

Almost surely, 2^213012230123 is an apocalyptic number.

213012230123 is a deficient number, since it is larger than the sum of its proper divisors (58407079957).

213012230123 is a wasteful number, since it uses less digits than its factorization.

213012230123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42407.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 213012230123 its reverse (321032210312), we get a palindrome (534044440435).

The spelling of 213012230123 in words is "two hundred thirteen billion, twelve million, two hundred thirty thousand, one hundred twenty-three".