21002122112213 has 8 divisors (see below), whose sum is σ = 22951672038720. Its totient is φ = 19059283202080.

The previous prime is 21002122112203. The next prime is 21002122112233. The reversal of 21002122112213 is 31221122120012.

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

It is not a de Polignac number, because 21002122112213 - 2⁶ = 21002122112149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002122112203) 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, 1677747545 + ... + 1677760062.

It is an arithmetic number, because the mean of its divisors is an integer number (2868959004840).

Almost surely, 2^{21002122112213} is an apocalyptic number.

It is an amenable number.

21002122112213 is a deficient number, since it is larger than the sum of its proper divisors (1949549926507).

21002122112213 is a wasteful number, since it uses less digits than its factorization.

21002122112213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355508187.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21002122112213 its reverse (31221122120012), we get a palindrome (52223244232225).

The spelling of 21002122112213 in words is "twenty-one trillion, two billion, one hundred twenty-two million, one hundred twelve thousand, two hundred thirteen".