30000121210000 has 100 divisors (see below), whose sum is σ = 72664805990700. Its totient is φ = 11994842176000.

The previous prime is 30000121209979. The next prime is 30000121210051. The reversal of 30000121210000 is 1212100003.

It can be written as a sum of positive squares in 10 ways, for example, as 8209187668224 + 21790933541776 = 2865168^2 + 4668076^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×30000121210000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22440366 + ... + 23739634.

It is an arithmetic number, because the mean of its divisors is an integer number (726648059907).

Almost surely, 2^{30000121210000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30000121210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36332402995350).

30000121210000 is an abundant number, since it is smaller than the sum of its proper divisors (42664684780700).

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

30000121210000 is a wasteful number, since it uses less digits than its factorization.

30000121210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301606 (or 1301585 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 30000121210000 its reverse (1212100003), we get a palindrome (30001333310003).

The spelling of 30000121210000 in words is "thirty trillion, one hundred twenty-one million, two hundred ten thousand".