11212001021111 has 4 divisors (see below), whose sum is σ = 12231273841224. Its totient is φ = 10192728201000.

The previous prime is 11212001020973. The next prime is 11212001021129. The reversal of 11212001021111 is 11112010021211.

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 11212001021111 - 2³⁸ = 10937123114167 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 (11212001021171) 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, 509636410040 + ... + 509636410061.

It is an arithmetic number, because the mean of its divisors is an integer number (3057818460306).

Almost surely, 2^{11212001021111} is an apocalyptic number.

11212001021111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11212001021111 is a deficient number, since it is larger than the sum of its proper divisors (1019272820113).

11212001021111 is a wasteful number, since it uses less digits than its factorization.

11212001021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019272820112.

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

Adding to 11212001021111 its reverse (11112010021211), we get a palindrome (22324011042322).

The spelling of 11212001021111 in words is "eleven trillion, two hundred twelve billion, one million, twenty-one thousand, one hundred eleven".