21101200101005 has 32 divisors (see below), whose sum is σ = 26972695056384. Its totient is φ = 15792388811776.

The previous prime is 21101200100999. The next prime is 21101200101011. The reversal of 21101200101005 is 50010100210112.

It is an interprime number because it is at equal distance from previous prime (21101200100999) and next prime (21101200101011).

It is a cyclic number.

It is not a de Polignac number, because 21101200101005 - 2⁶ = 21101200100941 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 8432522 + ... + 10644708.

It is an arithmetic number, because the mean of its divisors is an integer number (842896720512).

Almost surely, 2^{21101200101005} is an apocalyptic number.

It is an amenable number.

21101200101005 is a deficient number, since it is larger than the sum of its proper divisors (5871494955379).

21101200101005 is a wasteful number, since it uses less digits than its factorization.

21101200101005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212885.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 21101200101005 its reverse (50010100210112), we get a palindrome (71111300311117).

The spelling of 21101200101005 in words is "twenty-one trillion, one hundred one billion, two hundred million, one hundred one thousand, five".