31103322101221 has 16 divisors (see below), whose sum is σ = 32841629319168. Its totient is φ = 29399243742000.

The previous prime is 31103322101219. The next prime is 31103322101239. The reversal of 31103322101221 is 12210122330113.

It is a cyclic number.

It is not a de Polignac number, because 31103322101221 - 2¹ = 31103322101219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31103322101192 and 31103322101201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103322101521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22781031 + ... + 24107716.

It is an arithmetic number, because the mean of its divisors is an integer number (2052601832448).

Almost surely, 2^{31103322101221} is an apocalyptic number.

It is an amenable number.

31103322101221 is a deficient number, since it is larger than the sum of its proper divisors (1738307217947).

31103322101221 is a wasteful number, since it uses less digits than its factorization.

31103322101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46889112.

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

Adding to 31103322101221 its reverse (12210122330113), we get a palindrome (43313444431334).

The spelling of 31103322101221 in words is "thirty-one trillion, one hundred three billion, three hundred twenty-two million, one hundred one thousand, two hundred twenty-one".