121035503205 has 32 divisors (see below), whose sum is σ = 216067125120. Its totient is φ = 64284399360.

The previous prime is 121035503203. The next prime is 121035503233. The reversal of 121035503205 is 502305530121.

It is a happy number.

121035503205 is a `hidden beast` number, since 1 + 2 + 103 + 550 + 3 + 2 + 0 + 5 = 666.

It is not a de Polignac number, because 121035503205 - 2¹ = 121035503203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121035503203) 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, 1827547 + ... + 1892616.

It is an arithmetic number, because the mean of its divisors is an integer number (6752097660).

Almost surely, 2^121035503205 is an apocalyptic number.

121035503205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121035503205 is a deficient number, since it is larger than the sum of its proper divisors (95031621915).

121035503205 is a wasteful number, since it uses less digits than its factorization.

121035503205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720418 (or 3720412 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 121035503205 in words is "one hundred twenty-one billion, thirty-five million, five hundred three thousand, two hundred five".