30102121 has 12 divisors (see below), whose sum is σ = 37077588. Its totient is φ = 24283392.

The previous prime is 30102091. The next prime is 30102131. The reversal of 30102121 is 12120103.

It can be written as a sum of positive squares in 2 ways, for example, as 20830096 + 9272025 = 4564^2 + 3045^2 .

It is not a de Polignac number, because 30102121 - 2⁵ = 30102089 is a prime.

It is a super-2 number, since 2×30102121² = 1812275377397282, 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 = 30102098 and 30102107.

It is not an unprimeable number, because it can be changed into a prime (30102131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17236 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (3089799).

Almost surely, 2^30102121 is an apocalyptic number.

It is an amenable number.

30102121 is a deficient number, since it is larger than the sum of its proper divisors (6975467).

30102121 is a wasteful number, since it uses less digits than its factorization.

30102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36168 (or 36161 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 30102121 is about 5486.5399843617. The cubic root of 30102121 is about 311.0754220635.

Adding to 30102121 its reverse (12120103), we get a palindrome (42222224).

The spelling of 30102121 in words is "thirty million, one hundred two thousand, one hundred twenty-one".