21100331212223 has 2 divisors, whose sum is σ = 21100331212224. Its totient is φ = 21100331212222.

The previous prime is 21100331212183. The next prime is 21100331212229. The reversal of 21100331212223 is 32221213300112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100331212223 - 2⁶ = 21100331212159 is a prime.

It is a super-3 number, since 3×21100331212223³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100331212229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550165606111 + 10550165606112.

It is an arithmetic number, because the mean of its divisors is an integer number (10550165606112).

Almost surely, 2^{21100331212223} is an apocalyptic number.

21100331212223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100331212223 is an equidigital number, since it uses as much as digits as its factorization.

21100331212223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21100331212223 its reverse (32221213300112), we get a palindrome (53321544512335).

The spelling of 21100331212223 in words is "twenty-one trillion, one hundred billion, three hundred thirty-one million, two hundred twelve thousand, two hundred twenty-three".