21202000112105 has 8 divisors (see below), whose sum is σ = 25448962551432. Its totient is φ = 16957225145088.

The previous prime is 21202000112101. The next prime is 21202000112131. The reversal of 21202000112105 is 50121100020212.

It can be written as a sum of positive squares in 4 ways, for example, as 247331160976 + 20954668951129 = 497324^2 + 4577627^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21202000112105 - 2² = 21202000112101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202000112101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546846752 + ... + 546885521.

It is an arithmetic number, because the mean of its divisors is an integer number (3181120318929).

Almost surely, 2^{21202000112105} is an apocalyptic number.

It is an amenable number.

21202000112105 is a deficient number, since it is larger than the sum of its proper divisors (4246962439327).

21202000112105 is a wasteful number, since it uses less digits than its factorization.

21202000112105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093736155.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 21202000112105 its reverse (50121100020212), we get a palindrome (71323100132317).

The spelling of 21202000112105 in words is "twenty-one trillion, two hundred two billion, one hundred twelve thousand, one hundred five".