2122121198 has 4 divisors (see below), whose sum is σ = 3183181800. Its totient is φ = 1061060598.

The previous prime is 2122121189. The next prime is 2122121227. The reversal of 2122121198 is 8911212212.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2122121198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530530298 + ... + 530530301.

It is an arithmetic number, because the mean of its divisors is an integer number (795795450).

Almost surely, 2^2122121198 is an apocalyptic number.

2122121198 is a deficient number, since it is larger than the sum of its proper divisors (1061060602).

2122121198 is a wasteful number, since it uses less digits than its factorization.

2122121198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061060601.

The product of its digits is 1152, while the sum is 29.

The square root of 2122121198 is about 46066.4867121425. The cubic root of 2122121198 is about 1285.0599674256.

The spelling of 2122121198 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred ninety-eight".