30101021 has 2 divisors, whose sum is σ = 30101022. Its totient is φ = 30101020.

The previous prime is 30101003. The next prime is 30101041. The reversal of 30101021 is 12010103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29008996 + 1092025 = 5386^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 30101021 - 2¹⁰ = 30099997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30101041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15050510 + 15050511.

It is an arithmetic number, because the mean of its divisors is an integer number (15050511).

Almost surely, 2^30101021 is an apocalyptic number.

It is an amenable number.

30101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30101021 is an equidigital number, since it uses as much as digits as its factorization.

30101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 30101021 is about 5486.4397381180. The cubic root of 30101021 is about 311.0716328828.

Adding to 30101021 its reverse (12010103), we get a palindrome (42111124).

It can be divided in two parts, 3010102 and 1, that added together give a palindrome (3010103).

The spelling of 30101021 in words is "thirty million, one hundred one thousand, twenty-one".