121519953 has 16 divisors (see below), whose sum is σ = 189505600. Its totient is φ = 76749120.

The previous prime is 121519949. The next prime is 121519963. The reversal of 121519953 is 359915121.

It is not a de Polignac number, because 121519953 - 2² = 121519949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121519903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117928 + ... + 118953.

It is an arithmetic number, because the mean of its divisors is an integer number (11844100).

Almost surely, 2^121519953 is an apocalyptic number.

It is an amenable number.

121519953 is a deficient number, since it is larger than the sum of its proper divisors (67985647).

121519953 is a wasteful number, since it uses less digits than its factorization.

121519953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236909 (or 236903 counting only the distinct ones).

The product of its digits is 12150, while the sum is 36.

The square root of 121519953 is about 11023.6088918285. The cubic root of 121519953 is about 495.3161983417.

The spelling of 121519953 in words is "one hundred twenty-one million, five hundred nineteen thousand, nine hundred fifty-three".