21101012343 has 24 divisors (see below), whose sum is σ = 32627212800. Its totient is φ = 13101068304.

The previous prime is 21101012333. The next prime is 21101012353. The reversal of 21101012343 is 34321010112.

It is an interprime number because it is at equal distance from previous prime (21101012333) and next prime (21101012353).

It is not a de Polignac number, because 21101012343 - 2⁶ = 21101012279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101012333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1035655 + ... + 1055832.

It is an arithmetic number, because the mean of its divisors is an integer number (1359467200).

Almost surely, 2^21101012343 is an apocalyptic number.

21101012343 is a deficient number, since it is larger than the sum of its proper divisors (11526200457).

21101012343 is a wasteful number, since it uses less digits than its factorization.

21101012343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091571 (or 2091568 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21101012343 its reverse (34321010112), we get a palindrome (55422022455).

The spelling of 21101012343 in words is "twenty-one billion, one hundred one million, twelve thousand, three hundred forty-three".