11001112121421 has 24 divisors (see below), whose sum is σ = 16341081021720. Its totient is φ = 7126624964736.

The previous prime is 11001112121407. The next prime is 11001112121423. The reversal of 11001112121421 is 12412121110011.

11001112121421 is a `hidden beast` number, since 1 + 10 + 0 + 1 + 112 + 121 + 421 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 276050414025 + 10725061707396 = 525405^2 + 3274914^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11001112121421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11001112121394 and 11001112121403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001112121423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21111526 + ... + 21626343.

It is an arithmetic number, because the mean of its divisors is an integer number (680878375905).

Almost surely, 2^{11001112121421} is an apocalyptic number.

It is an amenable number.

11001112121421 is a deficient number, since it is larger than the sum of its proper divisors (5339968900299).

11001112121421 is a wasteful number, since it uses less digits than its factorization.

11001112121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42738685 (or 42738682 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11001112121421 its reverse (12412121110011), we get a palindrome (23413233231432).

The spelling of 11001112121421 in words is "eleven trillion, one billion, one hundred twelve million, one hundred twenty-one thousand, four hundred twenty-one".