30129121 has 9 divisors (see below), whose sum is σ = 33183633. Its totient is φ = 27335220.

The previous prime is 30129109. The next prime is 30129133. The reversal of 30129121 is 12192103.

The square root of 30129121 is 5489.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (30129109) and next prime (30129133).

It is not a de Polignac number, because 30129121 - 2⁵ = 30129089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30129721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 60130 + ... + 60628.

Almost surely, 2^30129121 is an apocalyptic number.

30129121 is the 5489-th square number.

30129121 is the 2745-th centered octagonal number.

It is an amenable number.

30129121 is a deficient number, since it is larger than the sum of its proper divisors (3054512).

30129121 is an frugal number, since it uses more digits than its factorization.

30129121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The cubic root of 30129121 is about 311.1684003012.

The spelling of 30129121 in words is "thirty million, one hundred twenty-nine thousand, one hundred twenty-one".