2101233278 has 4 divisors (see below), whose sum is σ = 3151849920. Its totient is φ = 1050616638.

The previous prime is 2101233191. The next prime is 2101233301. The reversal of 2101233278 is 8723321012.

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 2101233278.

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, 525308318 + ... + 525308321.

It is an arithmetic number, because the mean of its divisors is an integer number (787962480).

Almost surely, 2^2101233278 is an apocalyptic number.

2101233278 is a deficient number, since it is larger than the sum of its proper divisors (1050616642).

2101233278 is a wasteful number, since it uses less digits than its factorization.

2101233278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050616641.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 2101233278 is about 45839.2111406817. The cubic root of 2101233278 is about 1280.8298000746.

The spelling of 2101233278 in words is "two billion, one hundred one million, two hundred thirty-three thousand, two hundred seventy-eight".