221100020019 has 24 divisors (see below), whose sum is σ = 325508987232. Its totient is φ = 144586189440.

The previous prime is 221100020017. The next prime is 221100020047. The reversal of 221100020019 is 910020001122.

It is not a de Polignac number, because 221100020019 - 2¹ = 221100020017 is a prime.

It is a super-2 number, since 2×221100020019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221100019983 and 221100020010.

It is not an unprimeable number, because it can be changed into a prime (221100020017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 752314 + ... + 1004079.

It is an arithmetic number, because the mean of its divisors is an integer number (13562874468).

Almost surely, 2^221100020019 is an apocalyptic number.

221100020019 is a deficient number, since it is larger than the sum of its proper divisors (104408967213).

221100020019 is a wasteful number, since it uses less digits than its factorization.

221100020019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756667 (or 1756664 counting only the distinct ones).

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

The spelling of 221100020019 in words is "two hundred twenty-one billion, one hundred million, twenty thousand, nineteen".