30221111 has 4 divisors (see below), whose sum is σ = 30232224. Its totient is φ = 30210000.

The previous prime is 30221101. The next prime is 30221117. The reversal of 30221111 is 11112203.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11112203 = 17 ⋅653659.

It is a cyclic number.

It is not a de Polignac number, because 30221111 - 2¹⁸ = 29958967 is a prime.

It is a super-4 number, since 4×30221111⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30221092 and 30221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221117) 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, 1571 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (7558056).

Almost surely, 2^30221111 is an apocalyptic number.

30221111 is the 2459-th centered decagonal number.

30221111 is a deficient number, since it is larger than the sum of its proper divisors (11113).

30221111 is an equidigital number, since it uses as much as digits as its factorization.

30221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11112.

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

The square root of 30221111 is about 5497.3730999451. The cubic root of 30221111 is about 311.4847641998.

Adding to 30221111 its reverse (11112203), we get a palindrome (41333314).

The spelling of 30221111 in words is "thirty million, two hundred twenty-one thousand, one hundred eleven".