30000102021 has 24 divisors (see below), whose sum is σ = 44270029440. Its totient is φ = 19568095296.

The previous prime is 30000102007. The next prime is 30000102023. The reversal of 30000102021 is 12020100003.

It is a happy number.

It is not a de Polignac number, because 30000102021 - 2¹⁰ = 30000100997 is a prime.

It is a super-2 number, since 2×30000102021² (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 = 30000101994 and 30000102012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000102023) 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, 1509970 + ... + 1529708.

It is an arithmetic number, because the mean of its divisors is an integer number (1844584560).

Almost surely, 2^30000102021 is an apocalyptic number.

It is an amenable number.

30000102021 is a deficient number, since it is larger than the sum of its proper divisors (14269927419).

30000102021 is a wasteful number, since it uses less digits than its factorization.

30000102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23385 (or 23382 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 30000102021 its reverse (12020100003), we get a palindrome (42020202024).

The spelling of 30000102021 in words is "thirty billion, one hundred two thousand, twenty-one".