11321421321015 has 48 divisors (see below), whose sum is σ = 21370772928960. Its totient is φ = 5510997803520.

The previous prime is 11321421321013. The next prime is 11321421321029. The reversal of 11321421321015 is 51012312412311.

11321421321015 is a `hidden beast` number, since 1 + 1 + 3 + 21 + 421 + 3 + 210 + 1 + 5 = 666.

It is not a de Polignac number, because 11321421321015 - 2¹ = 11321421321013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11321421321015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321421321013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108671851 + ... + 108775980.

It is an arithmetic number, because the mean of its divisors is an integer number (445224436020).

Almost surely, 2^{11321421321015} is an apocalyptic number.

11321421321015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11321421321015 is a deficient number, since it is larger than the sum of its proper divisors (10049351607945).

11321421321015 is a wasteful number, since it uses less digits than its factorization.

11321421321015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217447944 (or 217447941 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 11321421321015 its reverse (51012312412311), we get a palindrome (62333733733326).

The spelling of 11321421321015 in words is "eleven trillion, three hundred twenty-one billion, four hundred twenty-one million, three hundred twenty-one thousand, fifteen".