121988896 has 12 divisors (see below), whose sum is σ = 240165702. Its totient is φ = 60994432.

The previous prime is 121988887. The next prime is 121988897. The reversal of 121988896 is 698889121.

It can be written as a sum of positive squares in only one way, i.e., 63680400 + 58308496 = 7980^2 + 7636^2 .

It is not an unprimeable number, because it can be changed into a prime (121988897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906045 + ... + 1906108.

Almost surely, 2^121988896 is an apocalyptic number.

121988896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121988896 is a deficient number, since it is larger than the sum of its proper divisors (118176806).

121988896 is an equidigital number, since it uses as much as digits as its factorization.

121988896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812163 (or 3812155 counting only the distinct ones).

The product of its digits is 497664, while the sum is 52.

The square root of 121988896 is about 11044.8583512873. The cubic root of 121988896 is about 495.9525188680.

The spelling of 121988896 in words is "one hundred twenty-one million, nine hundred eighty-eight thousand, eight hundred ninety-six".