7121731100 has 72 divisors (see below), whose sum is σ = 16873170048. Its totient is φ = 2587556800.

The previous prime is 7121731061. The next prime is 7121731129. The reversal of 7121731100 is 11371217.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1963889 + ... + 1967511.

It is an arithmetic number, because the mean of its divisors is an integer number (234349584).

Almost surely, 2^7121731100 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 7121731100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8436585024).

7121731100 is an abundant number, since it is smaller than the sum of its proper divisors (9751438948).

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

7121731100 is a wasteful number, since it uses less digits than its factorization.

7121731100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435 (or 5428 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 23.

The square root of 7121731100 is about 84390.3495667603. The cubic root of 7121731100 is about 1923.9562430708.

The spelling of 7121731100 in words is "seven billion, one hundred twenty-one million, seven hundred thirty-one thousand, one hundred".