21214035600650 has 24 divisors (see below), whose sum is σ = 39458501702220. Its totient is φ = 8485529189760.

The previous prime is 21214035600617. The next prime is 21214035600661. The reversal of 21214035600650 is 5600653041212.

It can be written as a sum of positive squares in 6 ways, for example, as 2829295566601 + 18384740034049 = 1682051^2 + 4287743^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21214035600650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3036302 + ... + 7186598.

Almost surely, 2^{21214035600650} is an apocalyptic number.

21214035600650 is a deficient number, since it is larger than the sum of its proper divisors (18244466101570).

21214035600650 is a wasteful number, since it uses less digits than its factorization.

21214035600650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252538 (or 4252533 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 21214035600650 its reverse (5600653041212), we get a palindrome (26814688641862).

The spelling of 21214035600650 in words is "twenty-one trillion, two hundred fourteen billion, thirty-five million, six hundred thousand, six hundred fifty".