30201132131221 has 4 divisors (see below), whose sum is σ = 30215107668844. Its totient is φ = 30187156593600.

The previous prime is 30201132131207. The next prime is 30201132131231. The reversal of 30201132131221 is 12213123110203.

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 24565018728721 + 5636113402500 = 4956311^2 + 2374050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30201132131221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30201132131192 and 30201132131201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30201132131231) 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, 6987765570 + ... + 6987769891.

It is an arithmetic number, because the mean of its divisors is an integer number (7553776917211).

Almost surely, 2^{30201132131221} is an apocalyptic number.

It is an amenable number.

30201132131221 is a deficient number, since it is larger than the sum of its proper divisors (13975537623).

30201132131221 is a wasteful number, since it uses less digits than its factorization.

30201132131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13975537622.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 30201132131221 its reverse (12213123110203), we get a palindrome (42414255241424).

The spelling of 30201132131221 in words is "thirty trillion, two hundred one billion, one hundred thirty-two million, one hundred thirty-one thousand, two hundred twenty-one".