2021212245 has 64 divisors (see below), whose sum is σ = 3612672000. Its totient is φ = 958245120.

The previous prime is 2021212243. The next prime is 2021212279. The reversal of 2021212245 is 5422121202.

It is not a de Polignac number, because 2021212245 - 2¹ = 2021212243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021212241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1444056 + ... + 1445454.

It is an arithmetic number, because the mean of its divisors is an integer number (56448000).

Almost surely, 2^2021212245 is an apocalyptic number.

It is an amenable number.

2021212245 is a deficient number, since it is larger than the sum of its proper divisors (1591459755).

2021212245 is a wasteful number, since it uses less digits than its factorization.

2021212245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2021212245 is about 44957.8941344009. The cubic root of 2021212245 is about 1264.3596867750.

Adding to 2021212245 its reverse (5422121202), we get a palindrome (7443333447).

The spelling of 2021212245 in words is "two billion, twenty-one million, two hundred twelve thousand, two hundred forty-five".