30102122221 has 4 divisors (see below), whose sum is σ = 30102470944. Its totient is φ = 30101773500.

The previous prime is 30102122201. The next prime is 30102122233. The reversal of 30102122221 is 12222120103.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30102122221 - 2⁵ = 30102122189 is a prime.

It is a super-2 number, since 2×30102122221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30102122195 and 30102122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30102122201) 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, 61216 + ... + 252886.

It is an arithmetic number, because the mean of its divisors is an integer number (7525617736).

Almost surely, 2^30102122221 is an apocalyptic number.

It is an amenable number.

30102122221 is a deficient number, since it is larger than the sum of its proper divisors (348723).

30102122221 is a wasteful number, since it uses less digits than its factorization.

30102122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348722.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 30102122221 its reverse (12222120103), we get a palindrome (42324242324).

The spelling of 30102122221 in words is "thirty billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty-one".