212521000241 has 4 divisors (see below), whose sum is σ = 231841091184. Its totient is φ = 193200909300.

The previous prime is 212521000187. The next prime is 212521000277. The reversal of 212521000241 is 142000125212.

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 a de Polignac number, because none of the positive numbers 2^k-212521000241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212521000291) 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, 9660045455 + ... + 9660045476.

It is an arithmetic number, because the mean of its divisors is an integer number (57960272796).

Almost surely, 2^212521000241 is an apocalyptic number.

It is an amenable number.

212521000241 is a deficient number, since it is larger than the sum of its proper divisors (19320090943).

212521000241 is a wasteful number, since it uses less digits than its factorization.

212521000241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19320090942.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 212521000241 its reverse (142000125212), we get a palindrome (354521125453).

The spelling of 212521000241 in words is "two hundred twelve billion, five hundred twenty-one million, two hundred forty-one", and thus it is an aban number.