10521220000 has 120 divisors (see below), whose sum is σ = 26215358400. Its totient is φ = 4154592000.

The previous prime is 10521219991. The next prime is 10521220019. The reversal of 10521220000 is 2212501.

It is a super-2 number, since 2×10521220000² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1576671 + ... + 1583329.

It is an arithmetic number, because the mean of its divisors is an integer number (218461320).

Almost surely, 2^10521220000 is an apocalyptic number.

10521220000 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 10521220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13107679200).

10521220000 is an abundant number, since it is smaller than the sum of its proper divisors (15694138400).

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

10521220000 is an frugal number, since it uses more digits than its factorization.

10521220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768 (or 6745 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

Adding to 10521220000 its reverse (2212501), we get a palindrome (10523432501).

The spelling of 10521220000 in words is "ten billion, five hundred twenty-one million, two hundred twenty thousand".