21112140102123 has 16 divisors (see below), whose sum is σ = 32170975398656. Its totient is φ = 12064044342240.

The previous prime is 21112140102121. The next prime is 21112140102139. The reversal of 21112140102123 is 32120104121112.

It is not a de Polignac number, because 21112140102123 - 2¹ = 21112140102121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112140102123.

It is not an unprimeable number, because it can be changed into a prime (21112140102121) 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, 6864213 + ... + 9452073.

It is an arithmetic number, because the mean of its divisors is an integer number (2010685962416).

Almost surely, 2^{21112140102123} is an apocalyptic number.

21112140102123 is a deficient number, since it is larger than the sum of its proper divisors (11058835296533).

21112140102123 is a wasteful number, since it uses less digits than its factorization.

21112140102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976354.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 21112140102123 its reverse (32120104121112), we get a palindrome (53232244223235).

The spelling of 21112140102123 in words is "twenty-one trillion, one hundred twelve billion, one hundred forty million, one hundred two thousand, one hundred twenty-three".