21121102221223 has 8 divisors (see below), whose sum is σ = 22477040408592. Its totient is φ = 19777777412736.

The previous prime is 21121102221161. The next prime is 21121102221239. The reversal of 21121102221223 is 32212220112112.

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 21121102221223 - 2¹³ = 21121102213031 is a prime.

It is a super-2 number, since 2×21121102221223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21121102221194 and 21121102221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121102221623) 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, 3153341265 + ... + 3153347962.

It is an arithmetic number, because the mean of its divisors is an integer number (2809630051074).

Almost surely, 2^{21121102221223} is an apocalyptic number.

21121102221223 is a deficient number, since it is larger than the sum of its proper divisors (1355938187369).

21121102221223 is a wasteful number, since it uses less digits than its factorization.

21121102221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6306689441.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21121102221223 its reverse (32212220112112), we get a palindrome (53333322333335).

Subtracting 21121102221223 from its reverse (32212220112112), we obtain a square (11091117890889 = 3330333²).

The spelling of 21121102221223 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, two hundred twenty-three".