21161001244410 has 64 divisors (see below), whose sum is σ = 57629960870400. Its totient is φ = 5522871243456.

The previous prime is 21161001244403. The next prime is 21161001244433. The reversal of 21161001244410 is 1444210016112.

It is a happy number.

21161001244410 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 1 + 0 + 0 + 1 + 244 + 410 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 833754105 + ... + 833779484.

It is an arithmetic number, because the mean of its divisors is an integer number (900468138600).

Almost surely, 2^{21161001244410} is an apocalyptic number.

21161001244410 is an abundant number, since it is smaller than the sum of its proper divisors (36468959625990).

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

21161001244410 is a wasteful number, since it uses less digits than its factorization.

21161001244410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667533652 (or 1667533646 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The spelling of 21161001244410 in words is "twenty-one trillion, one hundred sixty-one billion, one million, two hundred forty-four thousand, four hundred ten".