21112020121151 has 2 divisors, whose sum is σ = 21112020121152. Its totient is φ = 21112020121150.

The previous prime is 21112020121103. The next prime is 21112020121169. The reversal of 21112020121151 is 15112102021112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112020121151 - 2²⁶ = 21111953012287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112020721151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010060575 + 10556010060576.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010060576).

Almost surely, 2^{21112020121151} is an apocalyptic number.

21112020121151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112020121151 is an equidigital number, since it uses as much as digits as its factorization.

21112020121151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 20.

Adding to 21112020121151 its reverse (15112102021112), we get a palindrome (36224122142263).

The spelling of 21112020121151 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred twenty-one thousand, one hundred fifty-one".