12012221011021 has 16 divisors (see below), whose sum is σ = 15020715565440. Its totient is φ = 9332397204480.

The previous prime is 12012221011013. The next prime is 12012221011057. The reversal of 12012221011021 is 12011012221021.

It is not a de Polignac number, because 12012221011021 - 2³ = 12012221011013 is a prime.

It is a super-2 number, since 2×12012221011021² (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 = 12012221010986 and 12012221011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012221011061) 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, 231432316 + ... + 231484213.

It is an arithmetic number, because the mean of its divisors is an integer number (938794722840).

Almost surely, 2^{12012221011021} is an apocalyptic number.

12012221011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012221011021 is a deficient number, since it is larger than the sum of its proper divisors (3008494554419).

12012221011021 is a wasteful number, since it uses less digits than its factorization.

12012221011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462916884.

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

Adding to 12012221011021 its reverse (12011012221021), we get a palindrome (24023233232042).

The spelling of 12012221011021 in words is "twelve trillion, twelve billion, two hundred twenty-one million, eleven thousand, twenty-one".