2121245245 has 16 divisors (see below), whose sum is σ = 2922933888. Its totient is φ = 1447669440.

The previous prime is 2121245237. The next prime is 2121245251. The reversal of 2121245245 is 5425421212.

It is a happy number.

It is not a de Polignac number, because 2121245245 - 2³ = 2121245237 is a prime.

It is a super-2 number, since 2×2121245245² = 8999362778870220050, which contains 22 as substring.

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, 136234 + ... + 151003.

It is an arithmetic number, because the mean of its divisors is an integer number (182683368).

Almost surely, 2^2121245245 is an apocalyptic number.

It is an amenable number.

2121245245 is a deficient number, since it is larger than the sum of its proper divisors (801688643).

2121245245 is a wasteful number, since it uses less digits than its factorization.

2121245245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287460.

The product of its digits is 6400, while the sum is 28.

The square root of 2121245245 is about 46056.9782443443. The cubic root of 2121245245 is about 1284.8831306754.

Adding to 2121245245 its reverse (5425421212), we get a palindrome (7546666457).

The spelling of 2121245245 in words is "two billion, one hundred twenty-one million, two hundred forty-five thousand, two hundred forty-five".