21110533351 has 2 divisors, whose sum is σ = 21110533352. Its totient is φ = 21110533350.

The previous prime is 21110533289. The next prime is 21110533393. The reversal of 21110533351 is 15333501112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110533351 - 2²¹ = 21108436199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110533051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555266675 + 10555266676.

It is an arithmetic number, because the mean of its divisors is an integer number (10555266676).

Almost surely, 2^21110533351 is an apocalyptic number.

21110533351 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110533351 is an equidigital number, since it uses as much as digits as its factorization.

21110533351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 25.

The spelling of 21110533351 in words is "twenty-one billion, one hundred ten million, five hundred thirty-three thousand, three hundred fifty-one".