30202121 has 4 divisors (see below), whose sum is σ = 30233412. Its totient is φ = 30170832.

The previous prime is 30202099. The next prime is 30202157. The reversal of 30202121 is 12120203.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12120203 = 1451 ⋅8353.

It can be written as a sum of positive squares in 2 ways, for example, as 19891600 + 10310521 = 4460^2 + 3211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30202121 is a prime.

It is a super-2 number, since 2×30202121² = 1824336225797282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30208121) 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, 14150 + ... + 16143.

It is an arithmetic number, because the mean of its divisors is an integer number (7558353).

Almost surely, 2^30202121 is an apocalyptic number.

It is an amenable number.

30202121 is a deficient number, since it is larger than the sum of its proper divisors (31291).

30202121 is an equidigital number, since it uses as much as digits as its factorization.

30202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31290.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 30202121 is about 5495.6456399590. The cubic root of 30202121 is about 311.4195081049.

Adding to 30202121 its reverse (12120203), we get a palindrome (42322324).

The spelling of 30202121 in words is "thirty million, two hundred two thousand, one hundred twenty-one".