135421551135421 has 16 divisors (see below), whose sum is σ = 151267915814400. Its totient is φ = 120636162816048.

The previous prime is 135421551135287. The next prime is 135421551135439. The reversal of 135421551135421 is 124531155124531.

It is a cyclic number.

It is not a de Polignac number, because 135421551135421 - 2¹⁵ = 135421551102653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135421555135421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2626153311 + ... + 2626204876.

It is an arithmetic number, because the mean of its divisors is an integer number (9454244738400).

Almost surely, 2^{135421551135421} is an apocalyptic number.

It is an amenable number.

135421551135421 is a deficient number, since it is larger than the sum of its proper divisors (15846364678979).

135421551135421 is a wasteful number, since it uses less digits than its factorization.

135421551135421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252358288.

The product of its digits is 360000, while the sum is 43.

The spelling of 135421551135421 in words is "one hundred thirty-five trillion, four hundred twenty-one billion, five hundred fifty-one million, one hundred thirty-five thousand, four hundred twenty-one".