21101200101007 has 4 divisors (see below), whose sum is σ = 22724369339560. Its totient is φ = 19478030862456.

The previous prime is 21101200100999. The next prime is 21101200101011. The reversal of 21101200101007 is 70010100210112.

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

It is a cyclic number.

It is not a de Polignac number, because 21101200101007 - 2³ = 21101200100999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101200101307) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 811584619257 + ... + 811584619282.

It is an arithmetic number, because the mean of its divisors is an integer number (5681092334890).

Almost surely, 2^{21101200101007} is an apocalyptic number.

21101200101007 is a deficient number, since it is larger than the sum of its proper divisors (1623169238553).

21101200101007 is a wasteful number, since it uses less digits than its factorization.

21101200101007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623169238552.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 21101200101007 its reverse (70010100210112), we get a palindrome (91111300311119).

The spelling of 21101200101007 in words is "twenty-one trillion, one hundred one billion, two hundred million, one hundred one thousand, seven".