21213612503041 has 12 divisors (see below), whose sum is σ = 25278938943300. Its totient is φ = 17739606272640.

The previous prime is 21213612503023. The next prime is 21213612503071. The reversal of 21213612503041 is 14030521631212.

It can be written as a sum of positive squares in 2 ways, for example, as 2499336503041 + 18714276000000 = 1580929^2 + 4326000^2 .

It is not a de Polignac number, because 21213612503041 - 2⁷ = 21213612502913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21213612502994 and 21213612503012.

It is not an unprimeable number, because it can be changed into a prime (21213612503071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5279642716 + ... + 5279646733.

It is an arithmetic number, because the mean of its divisors is an integer number (2106578245275).

Almost surely, 2^{21213612503041} is an apocalyptic number.

It is an amenable number.

21213612503041 is a deficient number, since it is larger than the sum of its proper divisors (4065326440259).

21213612503041 is a wasteful number, since it uses less digits than its factorization.

21213612503041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10559289504 (or 10559289497 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 21213612503041 in words is "twenty-one trillion, two hundred thirteen billion, six hundred twelve million, five hundred three thousand, forty-one".