202121010121243 has 2 divisors, whose sum is σ = 202121010121244. Its totient is φ = 202121010121242.

The previous prime is 202121010121189. The next prime is 202121010121273. The reversal of 202121010121243 is 342121010121202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202121010121243 - 2¹³ = 202121010113051 is a prime.

It is not a weakly prime, because it can be changed into another prime (202121010121273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060505060621 + 101060505060622.

It is an arithmetic number, because the mean of its divisors is an integer number (101060505060622).

Almost surely, 2^{202121010121243} is an apocalyptic number.

202121010121243 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121010121243 is an equidigital number, since it uses as much as digits as its factorization.

202121010121243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 202121010121243 its reverse (342121010121202), we get a palindrome (544242020242445).

The spelling of 202121010121243 in words is "two hundred two trillion, one hundred twenty-one billion, ten million, one hundred twenty-one thousand, two hundred forty-three".