31103130223100 has 144 divisors (see below), whose sum is σ = 75876018624000. Its totient is φ = 10980551366400.

The previous prime is 31103130223091. The next prime is 31103130223129. The reversal of 31103130223100 is 132203130113.

It is a super-2 number, since 2×31103130223100² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75471401 + ... + 75882399.

It is an arithmetic number, because the mean of its divisors is an integer number (526916796000).

Almost surely, 2^{31103130223100} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31103130223100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37938009312000).

31103130223100 is an abundant number, since it is smaller than the sum of its proper divisors (44772888400900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103130223100 is a wasteful number, since it uses less digits than its factorization.

31103130223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413580 (or 413573 counting only the distinct ones).

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

Adding to 31103130223100 its reverse (132203130113), we get a palindrome (31235333353213).

The spelling of 31103130223100 in words is "thirty-one trillion, one hundred three billion, one hundred thirty million, two hundred twenty-three thousand, one hundred".