31103032203100 has 288 divisors, whose sum is σ = 84642117557760. Its totient is φ = 9751383936000.

The previous prime is 31103032203059. The next prime is 31103032203121. The reversal of 31103032203100 is 130223030113.

It is a super-2 number, since 2×31103032203100² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18484534 + ... + 20096866.

It is an arithmetic number, because the mean of its divisors is an integer number (293896241520).

Almost surely, 2^{31103032203100} 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 31103032203100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42321058778880).

31103032203100 is an abundant number, since it is smaller than the sum of its proper divisors (53539085354660).

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

31103032203100 is a wasteful number, since it uses less digits than its factorization.

31103032203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612461 (or 1612454 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31103032203100 its reverse (130223030113), we get a palindrome (31233255233213).

The spelling of 31103032203100 in words is "thirty-one trillion, one hundred three billion, thirty-two million, two hundred three thousand, one hundred".