20212212134221 has 8 divisors (see below), whose sum is σ = 20492482749440. Its totient is φ = 19932033167712.

The previous prime is 20212212134131. The next prime is 20212212134249. The reversal of 20212212134221 is 12243121221202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212212134221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212212138221) 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, 22467981 + ... + 23350258.

It is an arithmetic number, because the mean of its divisors is an integer number (2561560343680).

Almost surely, 2^{20212212134221} is an apocalyptic number.

It is an amenable number.

20212212134221 is a deficient number, since it is larger than the sum of its proper divisors (280270615219).

20212212134221 is an equidigital number, since it uses as much as digits as its factorization.

20212212134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45824355.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 20212212134221 its reverse (12243121221202), we get a palindrome (32455333355423).

The spelling of 20212212134221 in words is "twenty trillion, two hundred twelve billion, two hundred twelve million, one hundred thirty-four thousand, two hundred twenty-one".