21104030040202 has 4 divisors (see below), whose sum is σ = 31656045060306. Its totient is φ = 10552015020100.

The previous prime is 21104030040187. The next prime is 21104030040221. The reversal of 21104030040202 is 20204003040112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12967496283681 + 8136533756521 = 3601041^2 + 2852461^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21104030040202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5276007510049 + ... + 5276007510052.

Almost surely, 2^{21104030040202} is an apocalyptic number.

21104030040202 is a deficient number, since it is larger than the sum of its proper divisors (10552015020104).

21104030040202 is a wasteful number, since it uses less digits than its factorization.

21104030040202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552015020103.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21104030040202 its reverse (20204003040112), we get a palindrome (41308033080314).

The spelling of 21104030040202 in words is "twenty-one trillion, one hundred four billion, thirty million, forty thousand, two hundred two".