30100021243 has 4 divisors (see below), whose sum is σ = 31137953040. Its totient is φ = 29062089448.

The previous prime is 30100021223. The next prime is 30100021247. The reversal of 30100021243 is 34212000103.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30100021243 is a prime.

It is a super-2 number, since 2×30100021243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30100021247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518965855 + ... + 518965912.

It is an arithmetic number, because the mean of its divisors is an integer number (7784488260).

Almost surely, 2^30100021243 is an apocalyptic number.

30100021243 is a deficient number, since it is larger than the sum of its proper divisors (1037931797).

30100021243 is a wasteful number, since it uses less digits than its factorization.

30100021243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037931796.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30100021243 its reverse (34212000103), we get a palindrome (64312021346).

The spelling of 30100021243 in words is "thirty billion, one hundred million, twenty-one thousand, two hundred forty-three".