12212111021021 has 8 divisors (see below), whose sum is σ = 12246874605504. Its totient is φ = 12177348388480.

The previous prime is 12212111021017. The next prime is 12212111021039. The reversal of 12212111021021 is 12012011121221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12212111021021 - 2² = 12212111021017 is a prime.

It is a super-2 number, since 2×12212111021021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212111021321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31445336 + ... + 31831326.

It is an arithmetic number, because the mean of its divisors is an integer number (1530859325688).

Almost surely, 2^{12212111021021} is an apocalyptic number.

It is an amenable number.

12212111021021 is a deficient number, since it is larger than the sum of its proper divisors (34763584483).

12212111021021 is an equidigital number, since it uses as much as digits as its factorization.

12212111021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475971.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12212111021021 its reverse (12012011121221), we get a palindrome (24224122142242).

The spelling of 12212111021021 in words is "twelve trillion, two hundred twelve billion, one hundred eleven million, twenty-one thousand, twenty-one".