21110201001111 has 16 divisors (see below), whose sum is σ = 28916025223904. Its totient is φ = 13689142124544.

The previous prime is 21110201001103. The next prime is 21110201001139. The reversal of 21110201001111 is 11110010201112.

It is not a de Polignac number, because 21110201001111 - 2³ = 21110201001103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110201001181) 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, 27123070 + ... + 27890523.

It is an arithmetic number, because the mean of its divisors is an integer number (1807251576494).

Almost surely, 2^{21110201001111} is an apocalyptic number.

21110201001111 is a deficient number, since it is larger than the sum of its proper divisors (7805824222793).

21110201001111 is a wasteful number, since it uses less digits than its factorization.

21110201001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55017090.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21110201001111 its reverse (11110010201112), we get a palindrome (32220211202223).

It can be divided in two parts, 21110201001 and 111, that added together give a palindrome (21110201112).

The spelling of 21110201001111 in words is "twenty-one trillion, one hundred ten billion, two hundred one million, one thousand, one hundred eleven".