2122121228 has 12 divisors (see below), whose sum is σ = 3722536272. Its totient is φ = 1058539440.

The previous prime is 2122121227. The next prime is 2122121279. The reversal of 2122121228 is 8221212212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2122121227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628400 + ... + 631767.

It is an arithmetic number, because the mean of its divisors is an integer number (310211356).

Almost surely, 2^2122121228 is an apocalyptic number.

It is an amenable number.

2122121228 is a deficient number, since it is larger than the sum of its proper divisors (1600415044).

2122121228 is a wasteful number, since it uses less digits than its factorization.

2122121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260592 (or 1260590 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 2122121228 is about 46066.4870377588. The cubic root of 2122121228 is about 1285.0599734811.

The spelling of 2122121228 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-eight".