211223145061 has 4 divisors (see below), whose sum is σ = 211229344800. Its totient is φ = 211216945324.

The previous prime is 211223145059. The next prime is 211223145097. The reversal of 211223145061 is 160541322112.

211223145061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211223145061 - 2¹ = 211223145059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211223145031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3048481 + ... + 3116998.

It is an arithmetic number, because the mean of its divisors is an integer number (52807336200).

Almost surely, 2^211223145061 is an apocalyptic number.

It is an amenable number.

211223145061 is a deficient number, since it is larger than the sum of its proper divisors (6199739).

211223145061 is an equidigital number, since it uses as much as digits as its factorization.

211223145061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199738.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 211223145061 its reverse (160541322112), we get a palindrome (371764467173).

The spelling of 211223145061 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred forty-five thousand, sixty-one".