202100123213081 has 2 divisors, whose sum is σ = 202100123213082. Its totient is φ = 202100123213080.

The previous prime is 202100123212993. The next prime is 202100123213117. The reversal of 202100123213081 is 180312321001202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137786395680025 + 64313727533056 = 11738245^2 + 8019584^2 .

It is a cyclic number.

It is not a de Polignac number, because 202100123213081 - 2²⁶ = 202100056104217 is a prime.

It is a super-2 number, since 2×202100123213081² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202100123213081.

It is not a weakly prime, because it can be changed into another prime (202100123213381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050061606540 + 101050061606541.

It is an arithmetic number, because the mean of its divisors is an integer number (101050061606541).

Almost surely, 2^{202100123213081} is an apocalyptic number.

It is an amenable number.

202100123213081 is a deficient number, since it is larger than the sum of its proper divisors (1).

202100123213081 is an equidigital number, since it uses as much as digits as its factorization.

202100123213081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 202100123213081 its reverse (180312321001202), we get a palindrome (382412444214283).

The spelling of 202100123213081 in words is "two hundred two trillion, one hundred billion, one hundred twenty-three million, two hundred thirteen thousand, eighty-one".