21001001419 has 4 divisors (see below), whose sum is σ = 21266836960. Its totient is φ = 20735165880.

The previous prime is 21001001389. The next prime is 21001001453. The reversal of 21001001419 is 91410010012.

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

It is a cyclic number.

It is not a de Polignac number, because 21001001419 - 2⁷ = 21001001291 is a prime.

It is a super-2 number, since 2×21001001419² (a number of 21 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 = 21001001396 and 21001001405.

It is not an unprimeable number, because it can be changed into a prime (21001002419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132917652 + ... + 132917809.

It is an arithmetic number, because the mean of its divisors is an integer number (5316709240).

Almost surely, 2^21001001419 is an apocalyptic number.

21001001419 is a deficient number, since it is larger than the sum of its proper divisors (265835541).

21001001419 is an equidigital number, since it uses as much as digits as its factorization.

21001001419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265835540.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 21001001419 in words is "twenty-one billion, one million, one thousand, four hundred nineteen".