30001021312 has 16 divisors (see below), whose sum is σ = 59767659900. Its totient is φ = 15000510592.

The previous prime is 30001021291. The next prime is 30001021327. The reversal of 30001021312 is 21312010003.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×30001021312² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30001021292 and 30001021301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117191362 + ... + 117191617.

Almost surely, 2^30001021312 is an apocalyptic number.

30001021312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30001021312 is a deficient number, since it is larger than the sum of its proper divisors (29766638588).

30001021312 is an equidigital number, since it uses as much as digits as its factorization.

30001021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234382993 (or 234382981 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 30001021312 its reverse (21312010003), we get a palindrome (51313031315).

The spelling of 30001021312 in words is "thirty billion, one million, twenty-one thousand, three hundred twelve".