2212121245 has 16 divisors (see below), whose sum is σ = 2710366848. Its totient is φ = 1732800960.

The previous prime is 2212121237. The next prime is 2212121267. The reversal of 2212121245 is 5421212122.

2212121245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2212121245 - 2³ = 2212121237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36175 + ... + 75715.

It is an arithmetic number, because the mean of its divisors is an integer number (169397928).

Almost surely, 2^2212121245 is an apocalyptic number.

It is an amenable number.

2212121245 is a deficient number, since it is larger than the sum of its proper divisors (498245603).

2212121245 is a wasteful number, since it uses less digits than its factorization.

2212121245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39780.

The product of its digits is 640, while the sum is 22.

The square root of 2212121245 is about 47033.1930130201. The cubic root of 2212121245 is about 1302.9756776111.

Adding to 2212121245 its reverse (5421212122), we get a palindrome (7633333367).

The spelling of 2212121245 in words is "two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred forty-five".