31133020100 has 144 divisors (see below), whose sum is σ = 83270170368. Its totient is φ = 9838748160.

The previous prime is 31133020099. The next prime is 31133020141. The reversal of 31133020100 is 102033113.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 7487222 + ... + 7491378.

It is an arithmetic number, because the mean of its divisors is an integer number (578265072).

Almost surely, 2^31133020100 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 31133020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41635085184).

31133020100 is an abundant number, since it is smaller than the sum of its proper divisors (52137150268).

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

31133020100 is a wasteful number, since it uses less digits than its factorization.

31133020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014 (or 5007 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31133020100 its reverse (102033113), we get a palindrome (31235053213).

The spelling of 31133020100 in words is "thirty-one billion, one hundred thirty-three million, twenty thousand, one hundred".