31123323131101 has 32 divisors (see below), whose sum is σ = 33191627040000. Its totient is φ = 29101320686592.

The previous prime is 31123323131059. The next prime is 31123323131107. The reversal of 31123323131101 is 10113132332113.

It is a cyclic number.

It is not a de Polignac number, because 31123323131101 - 2⁷ = 31123323130973 is a prime.

It is a super-2 number, since 2×31123323131101² (a number of 28 digits) contains 22 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 (31123323131107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250954815 + ... + 251078803.

It is an arithmetic number, because the mean of its divisors is an integer number (1037238345000).

Almost surely, 2^{31123323131101} is an apocalyptic number.

It is an amenable number.

31123323131101 is a deficient number, since it is larger than the sum of its proper divisors (2068303908899).

31123323131101 is a wasteful number, since it uses less digits than its factorization.

31123323131101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124741.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31123323131101 its reverse (10113132332113), we get a palindrome (41236455463214).

The spelling of 31123323131101 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred twenty-three million, one hundred thirty-one thousand, one hundred one".