30121311000000 has 784 divisors, whose sum is σ = 109180819967616. Its totient is φ = 7268160000000.

The previous prime is 30121310999999. The next prime is 30121311000007. The reversal of 30121311000000 is 11312103.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 30121311000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121311000007) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 7490997990 + ... + 7491002010.

Almost surely, 2^{30121311000000} is an apocalyptic number.

30121311000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30121311000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54590409983808).

30121311000000 is an abundant number, since it is smaller than the sum of its proper divisors (79059508967616).

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

30121311000000 is an equidigital number, since it uses as much as digits as its factorization.

30121311000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304 (or 4269 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 30121311000000 its reverse (11312103), we get a palindrome (30121322312103).

The spelling of 30121311000000 in words is "thirty trillion, one hundred twenty-one billion, three hundred eleven million", and thus it is an aban number.