21112411555145 has 8 divisors (see below), whose sum is σ = 25354337384256. Its totient is φ = 16876966898736.

The previous prime is 21112411555093. The next prime is 21112411555171. The reversal of 21112411555145 is 54155511421112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21112411555145 - 2¹⁴ = 21112411538761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112411555099 and 21112411555108.

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, 1620286007 + ... + 1620299036.

It is an arithmetic number, because the mean of its divisors is an integer number (3169292173032).

Almost surely, 2^{21112411555145} is an apocalyptic number.

It is an amenable number.

21112411555145 is a deficient number, since it is larger than the sum of its proper divisors (4241925829111).

21112411555145 is a wasteful number, since it uses less digits than its factorization.

21112411555145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240586351.

The product of its digits is 40000, while the sum is 38.

Adding to 21112411555145 its reverse (54155511421112), we get a palindrome (75267922976257).

The spelling of 21112411555145 in words is "twenty-one trillion, one hundred twelve billion, four hundred eleven million, five hundred fifty-five thousand, one hundred forty-five".