212011045 has 4 divisors (see below), whose sum is σ = 254413260. Its totient is φ = 169608832.

The previous prime is 212011043. The next prime is 212011049. The reversal of 212011045 is 540110212.

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 131262849 + 80748196 = 11457^2 + 8986^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011045 - 2¹ = 212011043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011043) 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, 21201100 + ... + 21201109.

It is an arithmetic number, because the mean of its divisors is an integer number (63603315).

Almost surely, 2^212011045 is an apocalyptic number.

It is an amenable number.

212011045 is a deficient number, since it is larger than the sum of its proper divisors (42402215).

212011045 is an equidigital number, since it uses as much as digits as its factorization.

212011045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42402214.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 212011045 is about 14560.5990604782. The cubic root of 212011045 is about 596.2835506849.

Adding to 212011045 its reverse (540110212), we get a palindrome (752121257).

The spelling of 212011045 in words is "two hundred twelve million, eleven thousand, forty-five".