21012110410050 has 72 divisors (see below), whose sum is σ = 56453928787620. Its totient is φ = 5603091264000.

The previous prime is 21012110409971. The next prime is 21012110410061. The reversal of 21012110410050 is 5001401121012.

It can be written as a sum of positive squares in 6 ways, for example, as 7333659373329 + 13678451036721 = 2708073^2 + 3698439^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18385350 + ... + 19494750.

Almost surely, 2^{21012110410050} is an apocalyptic number.

21012110410050 is an abundant number, since it is smaller than the sum of its proper divisors (35441818377570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012110410050 is a wasteful number, since it uses less digits than its factorization.

21012110410050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151508 (or 1151500 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 21012110410050 its reverse (5001401121012), we get a palindrome (26013511531062).

The spelling of 21012110410050 in words is "twenty-one trillion, twelve billion, one hundred ten million, four hundred ten thousand, fifty".