121401455535 has 32 divisors (see below), whose sum is σ = 222786908160. Its totient is φ = 62658813600.

The previous prime is 121401455533. The next prime is 121401455543. The reversal of 121401455535 is 535554104121.

121401455535 is a `hidden beast` number, since 1 + 21 + 40 + 1 + 45 + 553 + 5 = 666.

It is not a de Polignac number, because 121401455535 - 2¹ = 121401455533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121401455535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121401455531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14500171 + ... + 14508540.

It is an arithmetic number, because the mean of its divisors is an integer number (6962090880).

Almost surely, 2^121401455535 is an apocalyptic number.

121401455535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121401455535 is a deficient number, since it is larger than the sum of its proper divisors (101385452625).

121401455535 is a wasteful number, since it uses less digits than its factorization.

121401455535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29008756 (or 29008750 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

Adding to 121401455535 its reverse (535554104121), we get a palindrome (656955559656).

The spelling of 121401455535 in words is "one hundred twenty-one billion, four hundred one million, four hundred fifty-five thousand, five hundred thirty-five".