210030101 has 2 divisors, whose sum is σ = 210030102. Its totient is φ = 210030100.

The previous prime is 210030091. The next prime is 210030109. The reversal of 210030101 is 101030012.

It is an a-pointer prime, because the next prime (210030109) can be obtained adding 210030101 to its sum of digits (8).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113401201 + 96628900 = 10649^2 + 9830^2 .

It is a cyclic number.

It is not a de Polignac number, because 210030101 - 2¹⁴ = 210013717 is a prime.

It is a super-2 number, since 2×210030101² = 88225286652140402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210030109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105015050 + 105015051.

It is an arithmetic number, because the mean of its divisors is an integer number (105015051).

Almost surely, 2^210030101 is an apocalyptic number.

It is an amenable number.

210030101 is a deficient number, since it is larger than the sum of its proper divisors (1).

210030101 is an equidigital number, since it uses as much as digits as its factorization.

210030101 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 210030101 is about 14492.4152921451. The cubic root of 210030101 is about 594.4205936012.

Adding to 210030101 its reverse (101030012), we get a palindrome (311060113).

The spelling of 210030101 in words is "two hundred ten million, thirty thousand, one hundred one".