11215521430 has 32 divisors (see below), whose sum is σ = 20389452768. Its totient is φ = 4441651200.

The previous prime is 11215521413. The next prime is 11215521431. The reversal of 11215521430 is 3412551211.

It is a junction number, because it is equal to n+sod(n) for n = 11215521395 and 11215521404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215521431) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 393460 + ... + 421000.

It is an arithmetic number, because the mean of its divisors is an integer number (637170399).

Almost surely, 2^11215521430 is an apocalyptic number.

11215521430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11215521430 is a deficient number, since it is larger than the sum of its proper divisors (9173931338).

11215521430 is a wasteful number, since it uses less digits than its factorization.

11215521430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27952.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 11215521430 in words is "eleven billion, two hundred fifteen million, five hundred twenty-one thousand, four hundred thirty".