21502223510041 has 4 divisors (see below), whose sum is σ = 21550761261072. Its totient is φ = 21453685759012.

The previous prime is 21502223510023. The next prime is 21502223510129. The reversal of 21502223510041 is 14001532220512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21502223510041 - 2¹³ = 21502223501849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21502223509991 and 21502223510009.

It is not an unprimeable number, because it can be changed into a prime (21502223510441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24268874851 + ... + 24268875736.

It is an arithmetic number, because the mean of its divisors is an integer number (5387690315268).

Almost surely, 2^{21502223510041} is an apocalyptic number.

It is an amenable number.

21502223510041 is a deficient number, since it is larger than the sum of its proper divisors (48537751031).

21502223510041 is an equidigital number, since it uses as much as digits as its factorization.

21502223510041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48537751030.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 21502223510041 its reverse (14001532220512), we get a palindrome (35503755730553).

The spelling of 21502223510041 in words is "twenty-one trillion, five hundred two billion, two hundred twenty-three million, five hundred ten thousand, forty-one".