2106120778 has 8 divisors (see below), whose sum is σ = 3325453920. Its totient is φ = 997636140.

The previous prime is 2106120733. The next prime is 2106120823. The reversal of 2106120778 is 8770216012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2106120733) and next prime (2106120823).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27712078 + ... + 27712153.

It is an arithmetic number, because the mean of its divisors is an integer number (415681740).

Almost surely, 2^2106120778 is an apocalyptic number.

2106120778 is a deficient number, since it is larger than the sum of its proper divisors (1219333142).

2106120778 is a wasteful number, since it uses less digits than its factorization.

2106120778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55424252.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 2106120778 is about 45892.4915209449. The cubic root of 2106120778 is about 1281.8221075153.

The spelling of 2106120778 in words is "two billion, one hundred six million, one hundred twenty thousand, seven hundred seventy-eight".