2121121996 has 36 divisors (see below), whose sum is σ = 4352049408. Its totient is φ = 901883808.

The previous prime is 2121121969. The next prime is 2121122009. The reversal of 2121121996 is 6991211212.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 17715 + ... + 67498.

Almost surely, 2^2121121996 is an apocalyptic number.

It is an amenable number.

2121121996 is an abundant number, since it is smaller than the sum of its proper divisors (2230927412).

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

2121121996 is a wasteful number, since it uses less digits than its factorization.

2121121996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85358 (or 85349 counting only the distinct ones).

The product of its digits is 3888, while the sum is 34.

The square root of 2121121996 is about 46055.6402191957. The cubic root of 2121121996 is about 1284.8582453510.

The spelling of 2121121996 in words is "two billion, one hundred twenty-one million, one hundred twenty-one thousand, nine hundred ninety-six".