21152542226105 has 8 divisors (see below), whose sum is σ = 25553406717000. Its totient is φ = 16808463083776.

The previous prime is 21152542225933. The next prime is 21152542226161. The reversal of 21152542226105 is 50162224525112.

It can be written as a sum of positive squares in 4 ways, for example, as 1763209523881 + 19389332702224 = 1327859^2 + 4403332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21152542226105 - 2³⁶ = 21083822749369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14196336320 + ... + 14196337809.

It is an arithmetic number, because the mean of its divisors is an integer number (3194175839625).

Almost surely, 2^{21152542226105} is an apocalyptic number.

It is an amenable number.

21152542226105 is a deficient number, since it is larger than the sum of its proper divisors (4400864490895).

21152542226105 is a wasteful number, since it uses less digits than its factorization.

21152542226105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28392674283.

The product of its (nonzero) digits is 96000, while the sum is 38.

The spelling of 21152542226105 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred forty-two million, two hundred twenty-six thousand, one hundred five".