21200000101 has 32 divisors (see below), whose sum is σ = 26354155520. Its totient is φ = 16642195200.

The previous prime is 21200000083. The next prime is 21200000113. The reversal of 21200000101 is 10100000212.

It is a cyclic number.

It is not a de Polignac number, because 21200000101 - 2⁷ = 21199999973 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200000141) 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, 5073325 + ... + 5077501.

It is an arithmetic number, because the mean of its divisors is an integer number (823567360).

Almost surely, 2^21200000101 is an apocalyptic number.

It is an amenable number.

21200000101 is a deficient number, since it is larger than the sum of its proper divisors (5154155419).

21200000101 is a wasteful number, since it uses less digits than its factorization.

21200000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465.

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

Adding to 21200000101 its reverse (10100000212), we get a palindrome (31300000313).

The spelling of 21200000101 in words is "twenty-one billion, two hundred million, one hundred one", and thus it is an aban number.