12011211101021 has 16 divisors (see below), whose sum is σ = 13113236380608. Its totient is φ = 10910871638400.

The previous prime is 12011211101017. The next prime is 12011211101033. The reversal of 12011211101021 is 12010111211021.

It is a cyclic number.

It is not a de Polignac number, because 12011211101021 - 2² = 12011211101017 is a prime.

It is a super-2 number, since 2×12011211101021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12011211100987 and 12011211101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011211101011) 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, 83696090 + ... + 83839476.

It is an arithmetic number, because the mean of its divisors is an integer number (819577273788).

Almost surely, 2^{12011211101021} is an apocalyptic number.

12011211101021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011211101021 is a deficient number, since it is larger than the sum of its proper divisors (1102025279587).

12011211101021 is a wasteful number, since it uses less digits than its factorization.

12011211101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149212.

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

Adding to 12011211101021 its reverse (12010111211021), we get a palindrome (24021322312042).

The spelling of 12011211101021 in words is "twelve trillion, eleven billion, two hundred eleven million, one hundred one thousand, twenty-one".