121251040202205 has 12 divisors (see below), whose sum is σ = 210168469683900. Its totient is φ = 64667221441152.

The previous prime is 121251040202161. The next prime is 121251040202209. The reversal of 121251040202205 is 502202040152121.

121251040202205 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 51 + 0 + 402 + 0 + 2 + 205 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64164281288121 + 57086758914084 = 8010261^2 + 7555578^2 .

It is not a de Polignac number, because 121251040202205 - 2¹⁸ = 121251039940061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121251040202209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1347233779980 + ... + 1347233780069.

It is an arithmetic number, because the mean of its divisors is an integer number (17514039140325).

Almost surely, 2^{121251040202205} is an apocalyptic number.

121251040202205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121251040202205 is a deficient number, since it is larger than the sum of its proper divisors (88917429481695).

121251040202205 is a wasteful number, since it uses less digits than its factorization.

121251040202205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694467560060 (or 2694467560057 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 121251040202205 its reverse (502202040152121), we get a palindrome (623453080354326).

The spelling of 121251040202205 in words is "one hundred twenty-one trillion, two hundred fifty-one billion, forty million, two hundred two thousand, two hundred five".