21533101325151 has 32 divisors (see below), whose sum is σ = 31104707622912. Its totient is φ = 13171722380160.

The previous prime is 21533101325107. The next prime is 21533101325171. The reversal of 21533101325151 is 15152310133512.

It is not a de Polignac number, because 21533101325151 - 2¹³ = 21533101316959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21533101325171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31391836 + ... + 32070446.

It is an arithmetic number, because the mean of its divisors is an integer number (972022113216).

Almost surely, 2^{21533101325151} is an apocalyptic number.

21533101325151 is a deficient number, since it is larger than the sum of its proper divisors (9571606297761).

21533101325151 is a wasteful number, since it uses less digits than its factorization.

21533101325151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683503.

The product of its (nonzero) digits is 13500, while the sum is 33.

Adding to 21533101325151 its reverse (15152310133512), we get a palindrome (36685411458663).

The spelling of 21533101325151 in words is "twenty-one trillion, five hundred thirty-three billion, one hundred one million, three hundred twenty-five thousand, one hundred fifty-one".