30000111021 has 24 divisors (see below), whose sum is σ = 47581881984. Its totient is φ = 18823596480.

The previous prime is 30000110947. The next prime is 30000111049. The reversal of 30000111021 is 12011100003.

It is not a de Polignac number, because 30000111021 - 2¹³ = 30000102829 is a prime.

It is a super-2 number, since 2×30000111021² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 30000110994 and 30000111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000111521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3626965 + ... + 3635226.

It is an arithmetic number, because the mean of its divisors is an integer number (1982578416).

Almost surely, 2^30000111021 is an apocalyptic number.

It is an amenable number.

30000111021 is a deficient number, since it is larger than the sum of its proper divisors (17581770963).

30000111021 is an equidigital number, since it uses as much as digits as its factorization.

30000111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262223 (or 7262211 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 30000111021 its reverse (12011100003), we get a palindrome (42011211024).

The spelling of 30000111021 in words is "thirty billion, one hundred eleven thousand, twenty-one".