31201301221 has 8 divisors (see below), whose sum is σ = 31770163040. Its totient is φ = 30635473968.

The previous prime is 31201301191. The next prime is 31201301249. The reversal of 31201301221 is 12210310213.

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 31201301221 - 2⁷ = 31201301093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31201301195 and 31201301204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201401221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737886 + ... + 779023.

It is an arithmetic number, because the mean of its divisors is an integer number (3971270380).

Almost surely, 2^31201301221 is an apocalyptic number.

It is an amenable number.

31201301221 is a deficient number, since it is larger than the sum of its proper divisors (568861819).

31201301221 is a wasteful number, since it uses less digits than its factorization.

31201301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517283.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31201301221 its reverse (12210310213), we get a palindrome (43411611434).

The spelling of 31201301221 in words is "thirty-one billion, two hundred one million, three hundred one thousand, two hundred twenty-one".