31221331103 has 8 divisors (see below), whose sum is σ = 32232568320. Its totient is φ = 30210350040.

The previous prime is 31221331073. The next prime is 31221331109. The reversal of 31221331103 is 30113312213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31221331103 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 (31221331109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201176 + ... + 320802.

It is an arithmetic number, because the mean of its divisors is an integer number (4029071040).

Almost surely, 2^31221331103 is an apocalyptic number.

31221331103 is a deficient number, since it is larger than the sum of its proper divisors (1011237217).

31221331103 is a wasteful number, since it uses less digits than its factorization.

31221331103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128077.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31221331103 its reverse (30113312213), we get a palindrome (61334643316).

The spelling of 31221331103 in words is "thirty-one billion, two hundred twenty-one million, three hundred thirty-one thousand, one hundred three".