12021022121011 has 4 divisors (see below), whose sum is σ = 12300580775032. Its totient is φ = 11741463466992.

The previous prime is 12021022120969. The next prime is 12021022121057. The reversal of 12021022121011 is 11012122012021.

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 12021022121011 - 2²⁵ = 12020988566579 is a prime.

It is a super-2 number, since 2×12021022121011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12021022121081) 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, 139779326946 + ... + 139779327031.

It is an arithmetic number, because the mean of its divisors is an integer number (3075145193758).

Almost surely, 2^{12021022121011} is an apocalyptic number.

12021022121011 is a deficient number, since it is larger than the sum of its proper divisors (279558654021).

12021022121011 is an equidigital number, since it uses as much as digits as its factorization.

12021022121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279558654020.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12021022121011 its reverse (11012122012021), we get a palindrome (23033144133032).

The spelling of 12021022121011 in words is "twelve trillion, twenty-one billion, twenty-two million, one hundred twenty-one thousand, eleven".