31301221333421 has 64 divisors (see below), whose sum is σ = 36514291968000. Its totient is φ = 26584673423616.

The previous prime is 31301221333397. The next prime is 31301221333441. The reversal of 31301221333421 is 12433312210313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301221333421 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 (31301221333441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4743324680 + ... + 4743331278.

It is an arithmetic number, because the mean of its divisors is an integer number (570535812000).

Almost surely, 2^{31301221333421} is an apocalyptic number.

It is an amenable number.

31301221333421 is a deficient number, since it is larger than the sum of its proper divisors (5213070634579).

31301221333421 is a wasteful number, since it uses less digits than its factorization.

31301221333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 31301221333421 its reverse (12433312210313), we get a palindrome (43734533543734).

The spelling of 31301221333421 in words is "thirty-one trillion, three hundred one billion, two hundred twenty-one million, three hundred thirty-three thousand, four hundred twenty-one".