21200612021241 has 4 divisors (see below), whose sum is σ = 28267482694992. Its totient is φ = 14133741347492.

The previous prime is 21200612021227. The next prime is 21200612021269. The reversal of 21200612021241 is 14212021600212.

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 21200612021241 - 2⁶ = 21200612021177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21200612021291) 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, 3533435336871 + ... + 3533435336876.

It is an arithmetic number, because the mean of its divisors is an integer number (7066870673748).

Almost surely, 2^{21200612021241} is an apocalyptic number.

It is an amenable number.

21200612021241 is a deficient number, since it is larger than the sum of its proper divisors (7066870673751).

21200612021241 is an equidigital number, since it uses as much as digits as its factorization.

21200612021241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066870673750.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21200612021241 its reverse (14212021600212), we get a palindrome (35412633621453).

The spelling of 21200612021241 in words is "twenty-one trillion, two hundred billion, six hundred twelve million, twenty-one thousand, two hundred forty-one".