21110201210111 has 4 divisors (see below), whose sum is σ = 22734062841672. Its totient is φ = 19486339578552.

The previous prime is 21110201210093. The next prime is 21110201210257. The reversal of 21110201210111 is 11101210201112.

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 21110201210111 - 2¹⁴ = 21110201193727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100201210111) 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, 811930815761 + ... + 811930815786.

It is an arithmetic number, because the mean of its divisors is an integer number (5683515710418).

Almost surely, 2^{21110201210111} is an apocalyptic number.

21110201210111 is a deficient number, since it is larger than the sum of its proper divisors (1623861631561).

21110201210111 is a wasteful number, since it uses less digits than its factorization.

21110201210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623861631560.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21110201210111 its reverse (11101210201112), we get a palindrome (32211411411223).

The spelling of 21110201210111 in words is "twenty-one trillion, one hundred ten billion, two hundred one million, two hundred ten thousand, one hundred eleven".