2101111898 has 4 divisors (see below), whose sum is σ = 3151667850. Its totient is φ = 1050555948.

The previous prime is 2101111897. The next prime is 2101111927. The reversal of 2101111898 is 8981111012.

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

It can be written as a sum of positive squares in only one way, i.e., 1914325009 + 186786889 = 43753^2 + 13667^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2101111897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525277973 + ... + 525277976.

Almost surely, 2^2101111898 is an apocalyptic number.

2101111898 is a deficient number, since it is larger than the sum of its proper divisors (1050555952).

2101111898 is a wasteful number, since it uses less digits than its factorization.

2101111898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050555951.

The product of its (nonzero) digits is 1152, while the sum is 32.

The square root of 2101111898 is about 45837.8871458971. The cubic root of 2101111898 is about 1280.8051367628.

The spelling of 2101111898 in words is "two billion, one hundred one million, one hundred eleven thousand, eight hundred ninety-eight".