31123112101 has 8 divisors (see below), whose sum is σ = 32482388160. Its totient is φ = 29764344192.

The previous prime is 31123112093. The next prime is 31123112113. The reversal of 31123112101 is 10121132113.

It is a happy number.

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 31123112101 - 2³ = 31123112093 is a prime.

It is a super-3 number, since 3×31123112101³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123112171) 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, 885 + ... + 249493.

It is an arithmetic number, because the mean of its divisors is an integer number (4060298520).

Almost surely, 2^31123112101 is an apocalyptic number.

It is an amenable number.

31123112101 is a deficient number, since it is larger than the sum of its proper divisors (1359276059).

31123112101 is a wasteful number, since it uses less digits than its factorization.

31123112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254075.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31123112101 its reverse (10121132113), we get a palindrome (41244244214).

The spelling of 31123112101 in words is "thirty-one billion, one hundred twenty-three million, one hundred twelve thousand, one hundred one".