21115526325050 has 12 divisors (see below), whose sum is σ = 39274878964686. Its totient is φ = 8446210530000.

The previous prime is 21115526325037. The next prime is 21115526325163. The reversal of 21115526325050 is 5052362551112.

It can be written as a sum of positive squares in 3 ways, for example, as 20205213790441 + 910312534609 = 4495021^2 + 954103^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21115526324995 and 21115526325013.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211155263201 + ... + 211155263300.

Almost surely, 2^{21115526325050} is an apocalyptic number.

21115526325050 is a deficient number, since it is larger than the sum of its proper divisors (18159352639636).

21115526325050 is a wasteful number, since it uses less digits than its factorization.

21115526325050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422310526513 (or 422310526508 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 38.

Adding to 21115526325050 its reverse (5052362551112), we get a palindrome (26167888876162).

The spelling of 21115526325050 in words is "twenty-one trillion, one hundred fifteen billion, five hundred twenty-six million, three hundred twenty-five thousand, fifty".