2122229978 has 32 divisors (see below), whose sum is σ = 3514603392. Its totient is φ = 953064000.

The previous prime is 2122229971. The next prime is 2122229983. The reversal of 2122229978 is 8799222212.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2122229971) 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, 1628075 + ... + 1629377.

It is an arithmetic number, because the mean of its divisors is an integer number (109831356).

Almost surely, 2^2122229978 is an apocalyptic number.

2122229978 is a deficient number, since it is larger than the sum of its proper divisors (1392373414).

2122229978 is a wasteful number, since it uses less digits than its factorization.

2122229978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150.

The product of its digits is 145152, while the sum is 44.

The square root of 2122229978 is about 46067.6673817983. The cubic root of 2122229978 is about 1285.0819244553.

The spelling of 2122229978 in words is "two billion, one hundred twenty-two million, two hundred twenty-nine thousand, nine hundred seventy-eight".