21230112101 has 4 divisors (see below), whose sum is σ = 23160122304. Its totient is φ = 19300101900.

The previous prime is 21230112053. The next prime is 21230112143. The reversal of 21230112101 is 10121103212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21230112101 - 2¹⁸ = 21229849957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230112401) 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, 965005085 + ... + 965005106.

It is an arithmetic number, because the mean of its divisors is an integer number (5790030576).

Almost surely, 2^21230112101 is an apocalyptic number.

It is an amenable number.

21230112101 is a deficient number, since it is larger than the sum of its proper divisors (1930010203).

21230112101 is a wasteful number, since it uses less digits than its factorization.

21230112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930010202.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21230112101 its reverse (10121103212), we get a palindrome (31351215313).

It can be divided in two parts, 21230 and 112101, that added together give a palindrome (133331).

The spelling of 21230112101 in words is "twenty-one billion, two hundred thirty million, one hundred twelve thousand, one hundred one".