121343310205 has 32 divisors (see below), whose sum is σ = 157591526400. Its totient is φ = 89163040512.

The previous prime is 121343310169. The next prime is 121343310227. The reversal of 121343310205 is 502013343121.

It is a happy number.

It is not a de Polignac number, because 121343310205 - 2¹³ = 121343302013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121343310205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28691031 + ... + 28695259.

It is an arithmetic number, because the mean of its divisors is an integer number (4924735200).

Almost surely, 2^121343310205 is an apocalyptic number.

It is an amenable number.

121343310205 is a deficient number, since it is larger than the sum of its proper divisors (36248216195).

121343310205 is a wasteful number, since it uses less digits than its factorization.

121343310205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6333.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 121343310205 its reverse (502013343121), we get a palindrome (623356653326).

The spelling of 121343310205 in words is "one hundred twenty-one billion, three hundred forty-three million, three hundred ten thousand, two hundred five".