221001221020019 has 32 divisors (see below), whose sum is σ = 264079523125440. Its totient is φ = 182569585766400.

The previous prime is 221001221020009. The next prime is 221001221020061. The reversal of 221001221020019 is 910020122100122.

It is a cyclic number.

It is not a de Polignac number, because 221001221020019 - 2⁸ = 221001221019763 is a prime.

It is a super-2 number, since 2×221001221020019² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221001221019976 and 221001221020003.

It is not an unprimeable number, because it can be changed into a prime (221001221020009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 733261277 + ... + 733562609.

It is an arithmetic number, because the mean of its divisors is an integer number (8252485097670).

Almost surely, 2^{221001221020019} is an apocalyptic number.

221001221020019 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

221001221020019 is a deficient number, since it is larger than the sum of its proper divisors (43078302105421).

221001221020019 is a wasteful number, since it uses less digits than its factorization.

221001221020019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436631.

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

The spelling of 221001221020019 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, twenty thousand, nineteen".