21012221200019 has 8 divisors (see below), whose sum is σ = 24247112398080. Its totient is φ = 17835616330056.

The previous prime is 21012221199979. The next prime is 21012221200021. The reversal of 21012221200019 is 91000212221012.

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

It is not a de Polignac number, because 21012221200019 - 2⁸ = 21012221199763 is a prime.

It is a super-2 number, since 2×21012221200019² (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 = 21012221199967 and 21012221200003.

It is not an unprimeable number, because it can be changed into a prime (21012221200099) 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, 14571581249 + ... + 14571582690.

It is an arithmetic number, because the mean of its divisors is an integer number (3030889049760).

Almost surely, 2^{21012221200019} is an apocalyptic number.

21012221200019 is a deficient number, since it is larger than the sum of its proper divisors (3234891198061).

21012221200019 is a wasteful number, since it uses less digits than its factorization.

21012221200019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29143164049.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21012221200019 in words is "twenty-one trillion, twelve billion, two hundred twenty-one million, two hundred thousand, nineteen".