121996 has 12 divisors (see below), whose sum is σ = 244048. Its totient is φ = 52272.

The previous prime is 121993. The next prime is 121997. The reversal of 121996 is 699121.

121996 = T₃₆ + T₃₇ + ... + T₉₁.

121996 = 129² + 130² + ... + 135².

121996 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 4357 = 121996 / (1 + 2 + 1 + 9 + 9 + 6).

It is not an unprimeable number, because it can be changed into a prime (121993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151 + ... + 2206.

2¹²¹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

121996 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121996 is a wasteful number, since it uses less digits than its factorization.

121996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368 (or 4366 counting only the distinct ones).

The product of its digits is 972, while the sum is 28.

The square root of 121996 is about 349.2792579012. The cubic root of 121996 is about 49.5962145914.

The spelling of 121996 in words is "one hundred twenty-one thousand, nine hundred ninety-six".