21200010000001 has 32 divisors (see below), whose sum is σ = 24709333001472. Its totient is φ = 17812948930560.

The previous prime is 21200009999999. The next prime is 21200010000017. The reversal of 21200010000001 is 10000001000212.

It is not a de Polignac number, because 21200010000001 - 2¹ = 21200009999999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (21200010100001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298821405 + ... + 298892341.

It is an arithmetic number, because the mean of its divisors is an integer number (772166656296).

Almost surely, 2^{21200010000001} is an apocalyptic number.

It is an amenable number.

21200010000001 is a deficient number, since it is larger than the sum of its proper divisors (3509323001471).

21200010000001 is a wasteful number, since it uses less digits than its factorization.

21200010000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73369.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 21200010000001 its reverse (10000001000212), we get a palindrome (31200011000213).

The spelling of 21200010000001 in words is "twenty-one trillion, two hundred billion, ten million, one", and thus it is an aban number.