21002212203313 has 4 divisors (see below), whose sum is σ = 22911504221808. Its totient is φ = 19092920184820.

The previous prime is 21002212203281. The next prime is 21002212203341. The reversal of 21002212203313 is 31330221220012.

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 21002212203313 - 2⁵ = 21002212203281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002212203353) 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, 954646009231 + ... + 954646009252.

It is an arithmetic number, because the mean of its divisors is an integer number (5727876055452).

Almost surely, 2^{21002212203313} is an apocalyptic number.

It is an amenable number.

21002212203313 is a deficient number, since it is larger than the sum of its proper divisors (1909292018495).

21002212203313 is a wasteful number, since it uses less digits than its factorization.

21002212203313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909292018494.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21002212203313 its reverse (31330221220012), we get a palindrome (52332433423325).

The spelling of 21002212203313 in words is "twenty-one trillion, two billion, two hundred twelve million, two hundred three thousand, three hundred thirteen".