21465134225131 has 2 divisors, whose sum is σ = 21465134225132. Its totient is φ = 21465134225130.

The previous prime is 21465134225107. The next prime is 21465134225179. The reversal of 21465134225131 is 13152243156412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21465134225131 - 2⁹ = 21465134224619 is a prime.

It is a super-2 number, since 2×21465134225131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21465134226131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10732567112565 + 10732567112566.

It is an arithmetic number, because the mean of its divisors is an integer number (10732567112566).

Almost surely, 2^{21465134225131} is an apocalyptic number.

21465134225131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21465134225131 is an equidigital number, since it uses as much as digits as its factorization.

21465134225131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 40.

The spelling of 21465134225131 in words is "twenty-one trillion, four hundred sixty-five billion, one hundred thirty-four million, two hundred twenty-five thousand, one hundred thirty-one".