21101104311 has 16 divisors (see below), whose sum is σ = 32157153024. Its totient is φ = 12056615424.

The previous prime is 21101104309. The next prime is 21101104313. The reversal of 21101104311 is 11340110112.

It is an interprime number because it is at equal distance from previous prime (21101104309) and next prime (21101104313).

It is not a de Polignac number, because 21101104311 - 2¹ = 21101104309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101104313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206871 + ... + 291543.

It is an arithmetic number, because the mean of its divisors is an integer number (2009822064).

Almost surely, 2^21101104311 is an apocalyptic number.

21101104311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21101104311 is a deficient number, since it is larger than the sum of its proper divisors (11056048713).

21101104311 is a wasteful number, since it uses less digits than its factorization.

21101104311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96550.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21101104311 its reverse (11340110112), we get a palindrome (32441214423).

The spelling of 21101104311 in words is "twenty-one billion, one hundred one million, one hundred four thousand, three hundred eleven".