121960128 has 42 divisors (see below), whose sum is σ = 323091556. Its totient is φ = 40602368.

The previous prime is 121960127. The next prime is 121960141. The reversal of 121960128 is 821069121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121960095 and 121960104.

It is not an unprimeable number, because it can be changed into a prime (121960123) 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 5 ways as a sum of consecutive naturals, for example, 152626 + ... + 153422.

Almost surely, 2^121960128 is an apocalyptic number.

It is an amenable number.

121960128 is an abundant number, since it is smaller than the sum of its proper divisors (201131428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121960128 is an frugal number, since it uses more digits than its factorization.

121960128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 121960128 is about 11043.5559490592. Note that the first 3 decimals coincide. The cubic root of 121960128 is about 495.9135298446.

Multiplying 121960128 by its product of nonzero digits (1728), we get a square (210747101184 = 459072²).

The spelling of 121960128 in words is "one hundred twenty-one million, nine hundred sixty thousand, one hundred twenty-eight".