21103212041313 has 4 divisors (see below), whose sum is σ = 28137616055088. Its totient is φ = 14068808027540.

The previous prime is 21103212041309. The next prime is 21103212041479. The reversal of 21103212041313 is 31314021230112.

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 21103212041313 - 2² = 21103212041309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103212048313) 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, 3517202006883 + ... + 3517202006888.

It is an arithmetic number, because the mean of its divisors is an integer number (7034404013772).

Almost surely, 2^{21103212041313} is an apocalyptic number.

It is an amenable number.

21103212041313 is a deficient number, since it is larger than the sum of its proper divisors (7034404013775).

21103212041313 is an equidigital number, since it uses as much as digits as its factorization.

21103212041313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034404013774.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21103212041313 its reverse (31314021230112), we get a palindrome (52417233271425).

The spelling of 21103212041313 in words is "twenty-one trillion, one hundred three billion, two hundred twelve million, forty-one thousand, three hundred thirteen".