202121203201121 has 2 divisors, whose sum is σ = 202121203201122. Its totient is φ = 202121203201120.

The previous prime is 202121203201111. The next prime is 202121203201129. The reversal of 202121203201121 is 121102302121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168962666062096 + 33158537139025 = 12998564^2 + 5758345^2 .

It is a cyclic number.

It is not a de Polignac number, because 202121203201121 - 2¹⁴ = 202121203184737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202121203201093 and 202121203201102.

It is not a weakly prime, because it can be changed into another prime (202121203201129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060601600560 + 101060601600561.

It is an arithmetic number, because the mean of its divisors is an integer number (101060601600561).

Almost surely, 2^{202121203201121} is an apocalyptic number.

It is an amenable number.

202121203201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121203201121 is an equidigital number, since it uses as much as digits as its factorization.

202121203201121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 202121203201121 its reverse (121102302121202), we get a palindrome (323223505322323).

The spelling of 202121203201121 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred three million, two hundred one thousand, one hundred twenty-one".