30331221061 has 4 divisors (see below), whose sum is σ = 30440720332. Its totient is φ = 30221721792.

The previous prime is 30331221059. The next prime is 30331221077. The reversal of 30331221061 is 16012213303.

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 8098920036 + 22232301025 = 89994^2 + 149105^2 .

It is a cyclic number.

It is not a de Polignac number, because 30331221061 - 2¹ = 30331221059 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 (30331227061) 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, 54749220 + ... + 54749773.

It is an arithmetic number, because the mean of its divisors is an integer number (7610180083).

Almost surely, 2^30331221061 is an apocalyptic number.

It is an amenable number.

30331221061 is a deficient number, since it is larger than the sum of its proper divisors (109499271).

30331221061 is a wasteful number, since it uses less digits than its factorization.

30331221061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109499270.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 30331221061 its reverse (16012213303), we get a palindrome (46343434364).

The spelling of 30331221061 in words is "thirty billion, three hundred thirty-one million, two hundred twenty-one thousand, sixty-one".