21113400001121 has 16 divisors (see below), whose sum is σ = 22227444707328. Its totient is φ = 20027170987200.

The previous prime is 21113400001051. The next prime is 21113400001163. The reversal of 21113400001121 is 12110000431112.

It is a cyclic number.

It is not a de Polignac number, because 21113400001121 - 2³⁸ = 20838522094177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21113400001121.

It is not an unprimeable number, because it can be changed into a prime (21113400001621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4615601 + ... + 7970606.

It is an arithmetic number, because the mean of its divisors is an integer number (1389215294208).

Almost surely, 2^{21113400001121} is an apocalyptic number.

It is an amenable number.

21113400001121 is a deficient number, since it is larger than the sum of its proper divisors (1114044706207).

21113400001121 is a wasteful number, since it uses less digits than its factorization.

21113400001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12587312.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21113400001121 its reverse (12110000431112), we get a palindrome (33223400432233).

The spelling of 21113400001121 in words is "twenty-one trillion, one hundred thirteen billion, four hundred million, one thousand, one hundred twenty-one".