21230102102311 has 4 divisors (see below), whose sum is σ = 21230111656624. Its totient is φ = 21230092548000.

The previous prime is 21230102102291. The next prime is 21230102102329. The reversal of 21230102102311 is 11320120103212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230102102311 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 (21230102132311) 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, 496486 + ... + 6535036.

It is an arithmetic number, because the mean of its divisors is an integer number (5307527914156).

Almost surely, 2^{21230102102311} is an apocalyptic number.

21230102102311 is a deficient number, since it is larger than the sum of its proper divisors (9554313).

21230102102311 is an equidigital number, since it uses as much as digits as its factorization.

21230102102311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554312.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21230102102311 its reverse (11320120103212), we get a palindrome (32550222205523).

The spelling of 21230102102311 in words is "twenty-one trillion, two hundred thirty billion, one hundred two million, one hundred two thousand, three hundred eleven".