135134110021 has 2 divisors, whose sum is σ = 135134110022. Its totient is φ = 135134110020.

The previous prime is 135134109983. The next prime is 135134110051. The reversal of 135134110021 is 120011431531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126088197921 + 9045912100 = 355089^2 + 95110^2 .

It is a cyclic number.

It is not a de Polignac number, because 135134110021 - 2⁷ = 135134109893 is a prime.

It is a super-2 number, since 2×135134110021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135134109974 and 135134110001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135134110051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67567055010 + 67567055011.

It is an arithmetic number, because the mean of its divisors is an integer number (67567055011).

Almost surely, 2^135134110021 is an apocalyptic number.

It is an amenable number.

135134110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

135134110021 is an equidigital number, since it uses as much as digits as its factorization.

135134110021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 135134110021 its reverse (120011431531), we get a palindrome (255145541552).

The spelling of 135134110021 in words is "one hundred thirty-five billion, one hundred thirty-four million, one hundred ten thousand, twenty-one".