21021121210313 has 8 divisors (see below), whose sum is σ = 24024199535040. Its totient is φ = 18018058137840.

The previous prime is 21021121210253. The next prime is 21021121210361. The reversal of 21021121210313 is 31301212112012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021121210313 - 2⁸ = 21021121210057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021121210613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689078 + ... + 6520511.

It is an arithmetic number, because the mean of its divisors is an integer number (3003024941880).

Almost surely, 2^{21021121210313} is an apocalyptic number.

It is an amenable number.

21021121210313 is a deficient number, since it is larger than the sum of its proper divisors (3003078324727).

21021121210313 is an equidigital number, since it uses as much as digits as its factorization.

21021121210313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626127.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21021121210313 its reverse (31301212112012), we get a palindrome (52322333322325).

The spelling of 21021121210313 in words is "twenty-one trillion, twenty-one billion, one hundred twenty-one million, two hundred ten thousand, three hundred thirteen".