10921210920 has 192 divisors, whose sum is σ = 36890380800. Its totient is φ = 2798691840.

The previous prime is 10921210919. The next prime is 10921210933. The reversal of 10921210920 is 2901212901.

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, 2325775 + ... + 2330465.

It is an arithmetic number, because the mean of its divisors is an integer number (192137400).

Almost surely, 2^10921210920 is an apocalyptic number.

10921210920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10921210920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18445190400).

10921210920 is an abundant number, since it is smaller than the sum of its proper divisors (25969169880).

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

10921210920 is a wasteful number, since it uses less digits than its factorization.

10921210920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960 (or 4953 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

It can be divided in two parts, 10921 and 210920, that added together give a square (221841 = 471²).

The spelling of 10921210920 in words is "ten billion, nine hundred twenty-one million, two hundred ten thousand, nine hundred twenty".