212221022021121 has 8 divisors (see below), whose sum is σ = 286370535739680. Its totient is φ = 139776094824992.

The previous prime is 212221022020981. The next prime is 212221022021123. The reversal of 212221022021121 is 121120220122212.

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 212221022021121 - 2¹⁷ = 212221021890049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212221022021123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426146630316 + ... + 426146630813.

It is an arithmetic number, because the mean of its divisors is an integer number (35796316967460).

Almost surely, 2^{212221022021121} is an apocalyptic number.

It is an amenable number.

212221022021121 is a deficient number, since it is larger than the sum of its proper divisors (74149513718559).

212221022021121 is an equidigital number, since it uses as much as digits as its factorization.

212221022021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852293261215.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212221022021121 its reverse (121120220122212), we get a palindrome (333341242143333).

The spelling of 212221022021121 in words is "two hundred twelve trillion, two hundred twenty-one billion, twenty-two million, twenty-one thousand, one hundred twenty-one".