30021210101 has 4 divisors (see below), whose sum is σ = 30024705900. Its totient is φ = 30017714304.

The previous prime is 30021210073. The next prime is 30021210103. The reversal of 30021210101 is 10101212003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3940575076 + 26080635025 = 62774^2 + 161495^2 .

It is a cyclic number.

It is not a de Polignac number, because 30021210101 - 2¹⁰ = 30021209077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30021210103) 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, 1734986 + ... + 1752203.

It is an arithmetic number, because the mean of its divisors is an integer number (7506176475).

Almost surely, 2^30021210101 is an apocalyptic number.

It is an amenable number.

30021210101 is a deficient number, since it is larger than the sum of its proper divisors (3495799).

30021210101 is an equidigital number, since it uses as much as digits as its factorization.

30021210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495798.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 30021210101 its reverse (10101212003), we get a palindrome (40122422104).

The spelling of 30021210101 in words is "thirty billion, twenty-one million, two hundred ten thousand, one hundred one".