30021102 has 48 divisors (see below), whose sum is σ = 70171920. Its totient is φ = 9244800.

The previous prime is 30021091. The next prime is 30021137. The reversal of 30021102 is 20112003.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12952 + ... + 15092.

It is an arithmetic number, because the mean of its divisors is an integer number (1461915).

Almost surely, 2^30021102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30021102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35085960).

30021102 is an abundant number, since it is smaller than the sum of its proper divisors (40150818).

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

30021102 is a wasteful number, since it uses less digits than its factorization.

30021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209 (or 2206 counting only the distinct ones).

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

The square root of 30021102 is about 5479.1515766586. The cubic root of 30021102 is about 310.7960877650.

Adding to 30021102 its reverse (20112003), we get a palindrome (50133105).

Subtracting from 30021102 its reverse (20112003), we obtain a palindrome (9909099).

The spelling of 30021102 in words is "thirty million, twenty-one thousand, one hundred two".