30421123 has 4 divisors (see below), whose sum is σ = 30640120. Its totient is φ = 30202128.

The previous prime is 30421117. The next prime is 30421129. The reversal of 30421123 is 32112403.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (30421117) and next prime (30421129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30421123 is a prime.

It is a super-2 number, since 2×30421123² = 1850889449162258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30421097 and 30421106.

It is not an unprimeable number, because it can be changed into a prime (30421129) 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, 109290 + ... + 109567.

It is an arithmetic number, because the mean of its divisors is an integer number (7660030).

Almost surely, 2^30421123 is an apocalyptic number.

30421123 is a deficient number, since it is larger than the sum of its proper divisors (218997).

30421123 is a wasteful number, since it uses less digits than its factorization.

30421123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218996.

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

The square root of 30421123 is about 5515.5346975611. The cubic root of 30421123 is about 312.1704190333.

Adding to 30421123 its reverse (32112403), we get a palindrome (62533526).

The spelling of 30421123 in words is "thirty million, four hundred twenty-one thousand, one hundred twenty-three".