134551531021 has 2 divisors, whose sum is σ = 134551531022. Its totient is φ = 134551531020.

The previous prime is 134551531007. The next prime is 134551531067. The reversal of 134551531021 is 120135155431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98929120900 + 35622410121 = 314530^2 + 188739^2 .

It is a cyclic number.

It is not a de Polignac number, because 134551531021 - 2²³ = 134543142413 is a prime.

It is a super-2 number, since 2×134551531021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134551538021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67275765510 + 67275765511.

It is an arithmetic number, because the mean of its divisors is an integer number (67275765511).

Almost surely, 2^134551531021 is an apocalyptic number.

It is an amenable number.

134551531021 is a deficient number, since it is larger than the sum of its proper divisors (1).

134551531021 is an equidigital number, since it uses as much as digits as its factorization.

134551531021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 134551531021 its reverse (120135155431), we get a palindrome (254686686452).

The spelling of 134551531021 in words is "one hundred thirty-four billion, five hundred fifty-one million, five hundred thirty-one thousand, twenty-one".