21230000210101 has 4 divisors (see below), whose sum is σ = 21230256827052. Its totient is φ = 21229743593152.

The previous prime is 21230000210053. The next prime is 21230000210113. The reversal of 21230000210101 is 10101200003212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13138080373201 + 8091919836900 = 3624649^2 + 2844630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230000210101 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 (21230000210161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128184340 + ... + 128349853.

It is an arithmetic number, because the mean of its divisors is an integer number (5307564206763).

Almost surely, 2^{21230000210101} is an apocalyptic number.

It is an amenable number.

21230000210101 is a deficient number, since it is larger than the sum of its proper divisors (256616951).

21230000210101 is an equidigital number, since it uses as much as digits as its factorization.

21230000210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256616950.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21230000210101 its reverse (10101200003212), we get a palindrome (31331200213313).

The spelling of 21230000210101 in words is "twenty-one trillion, two hundred thirty billion, two hundred ten thousand, one hundred one".