21221001110019 has 4 divisors (see below), whose sum is σ = 28294668146696. Its totient is φ = 14147334073344.

The previous prime is 21221001110009. The next prime is 21221001110069. The reversal of 21221001110019 is 91001110012212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21221001110019 - 2¹⁵ = 21221001077251 is a prime.

It is a super-2 number, since 2×21221001110019² (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 = 21221001109977 and 21221001110004.

It is not an unprimeable number, because it can be changed into a prime (21221001110009) 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, 3536833518334 + ... + 3536833518339.

It is an arithmetic number, because the mean of its divisors is an integer number (7073667036674).

Almost surely, 2^{21221001110019} is an apocalyptic number.

21221001110019 is a deficient number, since it is larger than the sum of its proper divisors (7073667036677).

21221001110019 is an equidigital number, since it uses as much as digits as its factorization.

21221001110019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073667036676.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 21221001110019 in words is "twenty-one trillion, two hundred twenty-one billion, one million, one hundred ten thousand, nineteen".