30121311000 has 256 divisors, whose sum is σ = 102999237120. Its totient is φ = 7268160000.

The previous prime is 30121310993. The next prime is 30121311001. The reversal of 30121311000 is 11312103.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121311001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7488990 + ... + 7493010.

It is an arithmetic number, because the mean of its divisors is an integer number (402340770).

Almost surely, 2^30121311000 is an apocalyptic number.

30121311000 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 30121311000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51499618560).

30121311000 is an abundant number, since it is smaller than the sum of its proper divisors (72877926120).

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

30121311000 is a wasteful number, since it uses less digits than its factorization.

30121311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283 (or 4269 counting only the distinct ones).

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

Adding to 30121311000 its reverse (11312103), we get a palindrome (30132623103).

It can be divided in two parts, 301213 and 11000, that added together give a palindrome (312213).

The spelling of 30121311000 in words is "thirty billion, one hundred twenty-one million, three hundred eleven thousand".