30212101 has 4 divisors (see below), whose sum is σ = 30914752. Its totient is φ = 29509452.

The previous prime is 30212093. The next prime is 30212129. The reversal of 30212101 is 10121203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10121203 = 29 ⋅349007.

It is a cyclic number.

It is not a de Polignac number, because 30212101 - 2³ = 30212093 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 (30212131) 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, 351261 + ... + 351346.

It is an arithmetic number, because the mean of its divisors is an integer number (7728688).

Almost surely, 2^30212101 is an apocalyptic number.

It is an amenable number.

30212101 is a deficient number, since it is larger than the sum of its proper divisors (702651).

30212101 is an equidigital number, since it uses as much as digits as its factorization.

30212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702650.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 30212101 is about 5496.5535565480. The cubic root of 30212101 is about 311.4538061864.

Adding to 30212101 its reverse (10121203), we get a palindrome (40333304).

It can be divided in two parts, 302 and 12101, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 30212101 in words is "thirty million, two hundred twelve thousand, one hundred one".