2112521045 has 4 divisors (see below), whose sum is σ = 2535025260. Its totient is φ = 1690016832.

The previous prime is 2112520987. The next prime is 2112521077. The reversal of 2112521045 is 5401252112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1666762276 + 445758769 = 40826^2 + 21113^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112521045 - 2⁶ = 2112520981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2112521045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211252100 + ... + 211252109.

It is an arithmetic number, because the mean of its divisors is an integer number (633756315).

Almost surely, 2^2112521045 is an apocalyptic number.

It is an amenable number.

2112521045 is a deficient number, since it is larger than the sum of its proper divisors (422504215).

2112521045 is an equidigital number, since it uses as much as digits as its factorization.

2112521045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422504214.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2112521045 is about 45962.1697159740. The cubic root of 2112521045 is about 1283.1192327752.

Adding to 2112521045 its reverse (5401252112), we get a palindrome (7513773157).

The spelling of 2112521045 in words is "two billion, one hundred twelve million, five hundred twenty-one thousand, forty-five".