31321022101 has 8 divisors (see below), whose sum is σ = 31584371000. Its totient is φ = 31058665920.

The previous prime is 31321022099. The next prime is 31321022123. The reversal of 31321022101 is 10122012313.

It can be written as a sum of positive squares in 4 ways, for example, as 6907272100 + 24413750001 = 83110^2 + 156249^2 .

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 31321022101 - 2¹ = 31321022099 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 (31321022191) 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, 184746 + ... + 311083.

It is an arithmetic number, because the mean of its divisors is an integer number (3948046375).

Almost surely, 2^31321022101 is an apocalyptic number.

It is an amenable number.

31321022101 is a deficient number, since it is larger than the sum of its proper divisors (263348899).

31321022101 is a wasteful number, since it uses less digits than its factorization.

31321022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496359.

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

Adding to 31321022101 its reverse (10122012313), we get a palindrome (41443034414).

The spelling of 31321022101 in words is "thirty-one billion, three hundred twenty-one million, twenty-two thousand, one hundred one".