30312213123 has 8 divisors (see below), whose sum is σ = 40420041408. Its totient is φ = 20206263464.

The previous prime is 30312213119. The next prime is 30312213131. The reversal of 30312213123 is 32131221303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30312213123 - 2² = 30312213119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30312213123.

It is not an unprimeable number, because it can be changed into a prime (30312213133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431565 + ... + 496862.

It is an arithmetic number, because the mean of its divisors is an integer number (5052505176).

Almost surely, 2^30312213123 is an apocalyptic number.

30312213123 is a deficient number, since it is larger than the sum of its proper divisors (10107828285).

30312213123 is a wasteful number, since it uses less digits than its factorization.

30312213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939313.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 30312213123 its reverse (32131221303), we get a palindrome (62443434426).

The spelling of 30312213123 in words is "thirty billion, three hundred twelve million, two hundred thirteen thousand, one hundred twenty-three".