30221201212031 has 4 divisors (see below), whose sum is σ = 30395890236552. Its totient is φ = 30046512187512.

The previous prime is 30221201212003. The next prime is 30221201212057. The reversal of 30221201212031 is 13021210212203.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30221201212031 is a prime.

It is a super-2 number, since 2×30221201212031² (a number of 28 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 = 30221201211994 and 30221201212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221201212831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87344512001 + ... + 87344512346.

It is an arithmetic number, because the mean of its divisors is an integer number (7598972559138).

Almost surely, 2^{30221201212031} is an apocalyptic number.

30221201212031 is a deficient number, since it is larger than the sum of its proper divisors (174689024521).

30221201212031 is a wasteful number, since it uses less digits than its factorization.

30221201212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174689024520.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 30221201212031 its reverse (13021210212203), we get a palindrome (43242411424234).

The spelling of 30221201212031 in words is "thirty trillion, two hundred twenty-one billion, two hundred one million, two hundred twelve thousand, thirty-one".