21130122101 has 4 divisors (see below), whose sum is σ = 23051042304. Its totient is φ = 19209201900.

The previous prime is 21130122043. The next prime is 21130122109. The reversal of 21130122101 is 10122103112.

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 a de Polignac number, because none of the positive numbers 2^k-21130122101 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 (21130122109) 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, 960460085 + ... + 960460106.

It is an arithmetic number, because the mean of its divisors is an integer number (5762760576).

Almost surely, 2^21130122101 is an apocalyptic number.

It is an amenable number.

21130122101 is a deficient number, since it is larger than the sum of its proper divisors (1920920203).

21130122101 is a wasteful number, since it uses less digits than its factorization.

21130122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920920202.

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

Adding to 21130122101 its reverse (10122103112), we get a palindrome (31252225213).

The spelling of 21130122101 in words is "twenty-one billion, one hundred thirty million, one hundred twenty-two thousand, one hundred one".