12211212212021 has 8 divisors (see below), whose sum is σ = 12213125433600. Its totient is φ = 12209299166448.

The previous prime is 12211212212009. The next prime is 12211212212033. The reversal of 12211212212021 is 12021221211221.

It is an interprime number because it is at equal distance from previous prime (12211212212009) and next prime (12211212212033).

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 12211212212021 - 2²² = 12211208017717 is a prime.

It is a super-2 number, since 2×12211212212021² (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 = 12211212211984 and 12211212212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211212212321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206418755 + ... + 206477903.

It is an arithmetic number, because the mean of its divisors is an integer number (1526640679200).

Almost surely, 2^{12211212212021} is an apocalyptic number.

It is an amenable number.

12211212212021 is a deficient number, since it is larger than the sum of its proper divisors (1913221579).

12211212212021 is a wasteful number, since it uses less digits than its factorization.

12211212212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88003.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12211212212021 its reverse (12021221211221), we get a palindrome (24232433423242).

The spelling of 12211212212021 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, two hundred twelve thousand, twenty-one".