20221211210121 has 12 divisors (see below), whose sum is σ = 30290209385072. Its totient is φ = 13480807473252.

The previous prime is 20221211210117. The next prime is 20221211210129. The reversal of 20221211210121 is 12101211212202.

20221211210121 is a `hidden beast` number, since 2 + 0 + 221 + 211 + 210 + 1 + 21 = 666.

It is not a de Polignac number, because 20221211210121 - 2² = 20221211210117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20221211210094 and 20221211210103.

It is not an unprimeable number, because it can be changed into a prime (20221211210129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41607430231 + ... + 41607430716.

Almost surely, 2^{20221211210121} is an apocalyptic number.

It is an amenable number.

20221211210121 is a deficient number, since it is larger than the sum of its proper divisors (10068998174951).

20221211210121 is an frugal number, since it uses more digits than its factorization.

20221211210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83214860962 (or 83214860950 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20221211210121 its reverse (12101211212202), we get a palindrome (32322422422323).

The spelling of 20221211210121 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-one".