20321122262121 has 12 divisors (see below), whose sum is σ = 29353811773572. Its totient is φ = 13546916556576.

The previous prime is 20321122262107. The next prime is 20321122262123. The reversal of 20321122262121 is 12126222112302.

20321122262121 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 1 + 12 + 2 + 2 + 621 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4653775022121 + 15667347240000 = 2157261^2 + 3958200^2 .

It is not a de Polignac number, because 20321122262121 - 2¹¹ = 20321122260073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20321122262123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41265366 + ... + 41754911.

It is an arithmetic number, because the mean of its divisors is an integer number (2446150981131).

Almost surely, 2^{20321122262121} is an apocalyptic number.

It is an amenable number.

20321122262121 is a deficient number, since it is larger than the sum of its proper divisors (9032689511451).

20321122262121 is a wasteful number, since it uses less digits than its factorization.

20321122262121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83047480 (or 83047477 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 20321122262121 its reverse (12126222112302), we get a palindrome (32447344374423).

The spelling of 20321122262121 in words is "twenty trillion, three hundred twenty-one billion, one hundred twenty-two million, two hundred sixty-two thousand, one hundred twenty-one".