21312213410103 has 64 divisors (see below), whose sum is σ = 39486421831680. Its totient is φ = 9871605388800.

The previous prime is 21312213410087. The next prime is 21312213410123. The reversal of 21312213410103 is 30101431221312.

It is not a de Polignac number, because 21312213410103 - 2⁴ = 21312213410087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312213410123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142743753 + ... + 142892978.

It is an arithmetic number, because the mean of its divisors is an integer number (616975341120).

Almost surely, 2^{21312213410103} is an apocalyptic number.

21312213410103 is a deficient number, since it is larger than the sum of its proper divisors (18174208421577).

21312213410103 is a wasteful number, since it uses less digits than its factorization.

21312213410103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285636788.

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

Adding to 21312213410103 its reverse (30101431221312), we get a palindrome (51413644631415).

The spelling of 21312213410103 in words is "twenty-one trillion, three hundred twelve billion, two hundred thirteen million, four hundred ten thousand, one hundred three".