121649311 has 12 divisors (see below), whose sum is σ = 143833800. Its totient is φ = 102558960.

The previous prime is 121649309. The next prime is 121649347. The reversal of 121649311 is 113946121.

It is not a de Polignac number, because 121649311 - 2¹ = 121649309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121649311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121649371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17361 + ... + 23338.

It is an arithmetic number, because the mean of its divisors is an integer number (11986150).

Almost surely, 2^121649311 is an apocalyptic number.

121649311 is a deficient number, since it is larger than the sum of its proper divisors (22184489).

121649311 is an equidigital number, since it uses as much as digits as its factorization.

121649311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40774 (or 40767 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 121649311 is about 11029.4746475070. The cubic root of 121649311 is about 495.4918907263.

The spelling of 121649311 in words is "one hundred twenty-one million, six hundred forty-nine thousand, three hundred eleven".