12021021010111 has 4 divisors (see below), whose sum is σ = 12156088662000. Its totient is φ = 11885953358224.

The previous prime is 12021021010057. The next prime is 12021021010129. The reversal of 12021021010111 is 11101012012021.

It is a happy number.

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 12021021010111 - 2⁷ = 12021021009983 is a prime.

It is a super-2 number, since 2×12021021010111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021021010091 and 12021021010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021028010111) 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, 67533825811 + ... + 67533825988.

It is an arithmetic number, because the mean of its divisors is an integer number (3039022165500).

Almost surely, 2^{12021021010111} is an apocalyptic number.

12021021010111 is a deficient number, since it is larger than the sum of its proper divisors (135067651889).

12021021010111 is an equidigital number, since it uses as much as digits as its factorization.

12021021010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135067651888.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12021021010111 its reverse (11101012012021), we get a palindrome (23122033022132).

The spelling of 12021021010111 in words is "twelve trillion, twenty-one billion, twenty-one million, ten thousand, one hundred eleven".