121415542135 has 8 divisors (see below), whose sum is σ = 145713883536. Its totient is φ = 97122278400.

The previous prime is 121415542133. The next prime is 121415542141. The reversal of 121415542135 is 531245514121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121415542135 - 2¹ = 121415542133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121415542135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121415542133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216609 + ... + 1312618.

It is an arithmetic number, because the mean of its divisors is an integer number (18214235442).

Almost surely, 2^121415542135 is an apocalyptic number.

121415542135 is a deficient number, since it is larger than the sum of its proper divisors (24298341401).

121415542135 is an equidigital number, since it uses as much as digits as its factorization.

121415542135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538833.

The product of its digits is 24000, while the sum is 34.

The spelling of 121415542135 in words is "one hundred twenty-one billion, four hundred fifteen million, five hundred forty-two thousand, one hundred thirty-five".