221001002019 has 48 divisors (see below), whose sum is σ = 382857891840. Its totient is φ = 125624958480.

The previous prime is 221001002009. The next prime is 221001002059. The reversal of 221001002019 is 910200100122.

It is not a de Polignac number, because 221001002019 - 2⁵ = 221001001987 is a prime.

It is a super-2 number, since 2×221001002019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221001001992 and 221001002010.

It is not an unprimeable number, because it can be changed into a prime (221001002009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184599 + ... + 689984.

It is an arithmetic number, because the mean of its divisors is an integer number (7976206080).

Almost surely, 2^221001002019 is an apocalyptic number.

221001002019 is a deficient number, since it is larger than the sum of its proper divisors (161856889821).

221001002019 is a wasteful number, since it uses less digits than its factorization.

221001002019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874797 (or 874784 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 221001002019 in words is "two hundred twenty-one billion, one million, two thousand, nineteen".