20221202211221 has 16 divisors (see below), whose sum is σ = 23363533442880. Its totient is φ = 17296805710080.

The previous prime is 20221202211211. The next prime is 20221202211233. The reversal of 20221202211221 is 12211220212202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221202211221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20221202211193 and 20221202211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221202211211) 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 15 ways as a sum of consecutive naturals, for example, 14185811 + ... + 15546048.

It is an arithmetic number, because the mean of its divisors is an integer number (1460220840180).

Almost surely, 2^{20221202211221} is an apocalyptic number.

It is an amenable number.

20221202211221 is a deficient number, since it is larger than the sum of its proper divisors (3142331231659).

20221202211221 is a wasteful number, since it uses less digits than its factorization.

20221202211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29735524.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20221202211221 its reverse (12211220212202), we get a palindrome (32432422423423).

The spelling of 20221202211221 in words is "twenty trillion, two hundred twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred twenty-one".