30011111221 has 8 divisors (see below), whose sum is σ = 36936752384. Its totient is φ = 23745054960.

The previous prime is 30011111201. The next prime is 30011111237. The reversal of 30011111221 is 12211111003.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30011111221 - 2⁵ = 30011111189 is a prime.

It is a super-2 number, since 2×30011111221² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30011111201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164896125 + ... + 164896306.

It is an arithmetic number, because the mean of its divisors is an integer number (4617094048).

Almost surely, 2^30011111221 is an apocalyptic number.

It is an amenable number.

30011111221 is a deficient number, since it is larger than the sum of its proper divisors (6925641163).

30011111221 is a wasteful number, since it uses less digits than its factorization.

30011111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329792451.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 30011111221 its reverse (12211111003), we get a palindrome (42222222224).

The spelling of 30011111221 in words is "thirty billion, eleven million, one hundred eleven thousand, two hundred twenty-one".