11221530520 has 32 divisors (see below), whose sum is σ = 25257974400. Its totient is φ = 4486917888.

The previous prime is 11221530517. The next prime is 11221530553. The reversal of 11221530520 is 2503512211.

It is a super-2 number, since 2×11221530520² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221530491 and 11221530500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57172 + ... + 160348.

It is an arithmetic number, because the mean of its divisors is an integer number (789311700).

Almost surely, 2^11221530520 is an apocalyptic number.

11221530520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221530520 is an abundant number, since it is smaller than the sum of its proper divisors (14036443880).

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

11221530520 is a wasteful number, since it uses less digits than its factorization.

11221530520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105907 (or 105903 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 11221530520 in words is "eleven billion, two hundred twenty-one million, five hundred thirty thousand, five hundred twenty".