30313123212 has 24 divisors (see below), whose sum is σ = 70818073200. Its totient is φ = 10091881216.

The previous prime is 30313123157. The next prime is 30313123223. The reversal of 30313123212 is 21232131303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1551537 + ... + 1570952.

It is an arithmetic number, because the mean of its divisors is an integer number (2950753050).

Almost surely, 2^30313123212 is an apocalyptic number.

It is an amenable number.

30313123212 is an abundant number, since it is smaller than the sum of its proper divisors (40504949988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30313123212 is a wasteful number, since it uses less digits than its factorization.

30313123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123305 (or 3123303 counting only the distinct ones).

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

Adding to 30313123212 its reverse (21232131303), we get a palindrome (51545254515).

The spelling of 30313123212 in words is "thirty billion, three hundred thirteen million, one hundred twenty-three thousand, two hundred twelve".