21120011101051 has 2 divisors, whose sum is σ = 21120011101052. Its totient is φ = 21120011101050.

The previous prime is 21120011101039. The next prime is 21120011101171. The reversal of 21120011101051 is 15010111002112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120011101051 - 2²⁹ = 21119474230139 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120011101751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560005550525 + 10560005550526.

It is an arithmetic number, because the mean of its divisors is an integer number (10560005550526).

Almost surely, 2^{21120011101051} is an apocalyptic number.

21120011101051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120011101051 is an equidigital number, since it uses as much as digits as its factorization.

21120011101051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 21120011101051 its reverse (15010111002112), we get a palindrome (36130122103163).

The spelling of 21120011101051 in words is "twenty-one trillion, one hundred twenty billion, eleven million, one hundred one thousand, fifty-one".