21375133461227 has 64 divisors (see below), whose sum is σ = 27536473896960. Its totient is φ = 16126962914304.

The previous prime is 21375133461217. The next prime is 21375133461277. The reversal of 21375133461227 is 72216433157312.

It is a cyclic number.

It is not a de Polignac number, because 21375133461227 - 2⁸ = 21375133460971 is a prime.

It is a super-2 number, since 2×21375133461227² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21375133461217) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1495489493 + ... + 1495503785.

It is an arithmetic number, because the mean of its divisors is an integer number (430257404640).

Almost surely, 2^{21375133461227} is an apocalyptic number.

21375133461227 is a deficient number, since it is larger than the sum of its proper divisors (6161340435733).

21375133461227 is a wasteful number, since it uses less digits than its factorization.

21375133461227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16492.

The product of its digits is 1270080, while the sum is 47.

The spelling of 21375133461227 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred thirty-three million, four hundred sixty-one thousand, two hundred twenty-seven".