221110001002021 has 8 divisors (see below), whose sum is σ = 224383715305344. Its totient is φ = 217850804279520.

The previous prime is 221110001002003. The next prime is 221110001002157. The reversal of 221110001002021 is 120200100011122.

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

It is a cyclic number.

It is not a de Polignac number, because 221110001002021 - 2¹⁷ = 221110000870949 is a prime.

It is a super-2 number, since 2×221110001002021² (a number of 29 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 = 221110001001992 and 221110001002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110001002001) 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, 3629364520 + ... + 3629425441.

It is an arithmetic number, because the mean of its divisors is an integer number (28047964413168).

Almost surely, 2^{221110001002021} is an apocalyptic number.

It is an amenable number.

221110001002021 is a deficient number, since it is larger than the sum of its proper divisors (3273714303323).

221110001002021 is an equidigital number, since it uses as much as digits as its factorization.

221110001002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258790411.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221110001002021 its reverse (120200100011122), we get a palindrome (341310101013143).

The spelling of 221110001002021 in words is "two hundred twenty-one trillion, one hundred ten billion, one million, two thousand, twenty-one".