21100324144250 has 128 divisors (see below), whose sum is σ = 42969139536960. Its totient is φ = 7712147251200.

The previous prime is 21100324144231. The next prime is 21100324144301. The reversal of 21100324144250 is 5244142300112.

It is a happy number.

It can be written as a sum of positive squares in 32 ways, for example, as 14825664868921 + 6274659275329 = 3850411^2 + 2504927^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 292662206 + ... + 292734294.

Almost surely, 2^{21100324144250} is an apocalyptic number.

21100324144250 is an abundant number, since it is smaller than the sum of its proper divisors (21868815392710).

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

21100324144250 is a wasteful number, since it uses less digits than its factorization.

21100324144250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73029 (or 73019 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 21100324144250 its reverse (5244142300112), we get a palindrome (26344466444362).

The spelling of 21100324144250 in words is "twenty-one trillion, one hundred billion, three hundred twenty-four million, one hundred forty-four thousand, two hundred fifty".