121154202005 has 16 divisors (see below), whose sum is σ = 153953445744. Its totient is φ = 91212303360.

The previous prime is 121154201969. The next prime is 121154202011. The reversal of 121154202005 is 500202451121.

It can be written as a sum of positive squares in 8 ways, for example, as 5515438756 + 115638763249 = 74266^2 + 340057^2 .

It is not a de Polignac number, because 121154202005 - 2¹⁶ = 121154136469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 787295 + ... + 928515.

It is an arithmetic number, because the mean of its divisors is an integer number (9622090359).

Almost surely, 2^121154202005 is an apocalyptic number.

It is an amenable number.

121154202005 is a deficient number, since it is larger than the sum of its proper divisors (32799243739).

121154202005 is a wasteful number, since it uses less digits than its factorization.

121154202005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151336.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 121154202005 its reverse (500202451121), we get a palindrome (621356653126).

The spelling of 121154202005 in words is "one hundred twenty-one billion, one hundred fifty-four million, two hundred two thousand, five".