23101030021 has 4 divisors (see below), whose sum is σ = 23101334272. Its totient is φ = 23100725772.

The previous prime is 23101030013. The next prime is 23101030063. The reversal of 23101030021 is 12003010132.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23101030021 - 2³ = 23101030013 is a prime.

It is a super-2 number, since 2×23101030021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23101029983 and 23101030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23101030081) 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, 66460 + ... + 224986.

It is an arithmetic number, because the mean of its divisors is an integer number (5775333568).

Almost surely, 2^23101030021 is an apocalyptic number.

It is an amenable number.

23101030021 is a deficient number, since it is larger than the sum of its proper divisors (304251).

23101030021 is a wasteful number, since it uses less digits than its factorization.

23101030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304250.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 23101030021 its reverse (12003010132), we get a palindrome (35104040153).

The spelling of 23101030021 in words is "twenty-three billion, one hundred one million, thirty thousand, twenty-one".