135422521420 has 24 divisors (see below), whose sum is σ = 284596306848. Its totient is φ = 54129196800.

The previous prime is 135422521397. The next prime is 135422521471. The reversal of 135422521420 is 24125224531.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2460336 + ... + 2514775.

It is an arithmetic number, because the mean of its divisors is an integer number (11858179452).

Almost surely, 2^135422521420 is an apocalyptic number.

135422521420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135422521420 is an abundant number, since it is smaller than the sum of its proper divisors (149173785428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135422521420 is a wasteful number, since it uses less digits than its factorization.

135422521420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976481 (or 4976479 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 135422521420 its reverse (24125224531), we get a palindrome (159547745951).

The spelling of 135422521420 in words is "one hundred thirty-five billion, four hundred twenty-two million, five hundred twenty-one thousand, four hundred twenty".