21112001114111 has 4 divisors (see below), whose sum is σ = 21112068399072. Its totient is φ = 21111933829152.

The previous prime is 21112001114107. The next prime is 21112001114131. The reversal of 21112001114111 is 11141110021112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21112001114111 - 2² = 21112001114107 is a prime.

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 21112001114111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112001114131) 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, 33169610 + ... + 33800103.

It is an arithmetic number, because the mean of its divisors is an integer number (5278017099768).

Almost surely, 2^{21112001114111} is an apocalyptic number.

21112001114111 is a deficient number, since it is larger than the sum of its proper divisors (67284961).

21112001114111 is an equidigital number, since it uses as much as digits as its factorization.

21112001114111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67284960.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 21112001114111 its reverse (11141110021112), we get a palindrome (32253111135223).

The spelling of 21112001114111 in words is "twenty-one trillion, one hundred twelve billion, one million, one hundred fourteen thousand, one hundred eleven".