2111012778 has 32 divisors (see below), whose sum is σ = 4853079936. Its totient is φ = 599658048.

The previous prime is 2111012773. The next prime is 2111012789. The reversal of 2111012778 is 8772101112.

It is not an unprimeable number, because it can be changed into a prime (2111012773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138001 + ... + 152532.

It is an arithmetic number, because the mean of its divisors is an integer number (151658748).

Almost surely, 2^2111012778 is an apocalyptic number.

2111012778 is an abundant number, since it is smaller than the sum of its proper divisors (2742067158).

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

2111012778 is a wasteful number, since it uses less digits than its factorization.

2111012778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290718.

The product of its (nonzero) digits is 1568, while the sum is 30.

The square root of 2111012778 is about 45945.7590861224. The cubic root of 2111012778 is about 1282.8137924801.

The spelling of 2111012778 in words is "two billion, one hundred eleven million, twelve thousand, seven hundred seventy-eight".