31123432101 has 16 divisors (see below), whose sum is σ = 42388704000. Its totient is φ = 20303721408.

The previous prime is 31123432061. The next prime is 31123432103. The reversal of 31123432101 is 10123432113.

It is not a de Polignac number, because 31123432101 - 2⁹ = 31123431589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123432103) 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, 883575 + ... + 918123.

It is an arithmetic number, because the mean of its divisors is an integer number (2649294000).

Almost surely, 2^31123432101 is an apocalyptic number.

It is an amenable number.

31123432101 is a deficient number, since it is larger than the sum of its proper divisors (11265271899).

31123432101 is a wasteful number, since it uses less digits than its factorization.

31123432101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40988.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31123432101 its reverse (10123432113), we get a palindrome (41246864214).

The spelling of 31123432101 in words is "thirty-one billion, one hundred twenty-three million, four hundred thirty-two thousand, one hundred one".