21112122111053 has 2 divisors, whose sum is σ = 21112122111054. Its totient is φ = 21112122111052.

The previous prime is 21112122111013. The next prime is 21112122111107. The reversal of 21112122111053 is 35011122121112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20049600271684 + 1062521839369 = 4477678^2 + 1030787^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112122111053 - 2²⁶ = 21112055002189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112122111013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556061055526 + 10556061055527.

It is an arithmetic number, because the mean of its divisors is an integer number (10556061055527).

Almost surely, 2^{21112122111053} is an apocalyptic number.

It is an amenable number.

21112122111053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112122111053 is an equidigital number, since it uses as much as digits as its factorization.

21112122111053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 23.

Adding to 21112122111053 its reverse (35011122121112), we get a palindrome (56123244232165).

The spelling of 21112122111053 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, one hundred eleven thousand, fifty-three".