12111011021011 has 4 divisors (see below), whose sum is σ = 13841155452592. Its totient is φ = 10380866589432.

The previous prime is 12111011020973. The next prime is 12111011021027. The reversal of 12111011021011 is 11012011011121.

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 12111011021011 - 2¹³ = 12111011012819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111011020982 and 12111011021000.

It is not an unprimeable number, because it can be changed into a prime (12111011021611) 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, 865072215780 + ... + 865072215793.

It is an arithmetic number, because the mean of its divisors is an integer number (3460288863148).

Almost surely, 2^{12111011021011} is an apocalyptic number.

12111011021011 is a deficient number, since it is larger than the sum of its proper divisors (1730144431581).

12111011021011 is an equidigital number, since it uses as much as digits as its factorization.

12111011021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730144431580.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 12111011021011 its reverse (11012011011121), we get a palindrome (23123022032132).

It can be divided in two parts, 121110110 and 21011, that added together give a palindrome (121131121).

The spelling of 12111011021011 in words is "twelve trillion, one hundred eleven billion, eleven million, twenty-one thousand, eleven".