1020221221111 has 8 divisors (see below), whose sum is σ = 1036985418864. Its totient is φ = 1003458289920.

The previous prime is 1020221221093. The next prime is 1020221221127. The reversal of 1020221221111 is 1111221220201.

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 1020221221111 - 2¹⁷ = 1020221090039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020221221141) 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, 1381836 + ... + 1987438.

It is an arithmetic number, because the mean of its divisors is an integer number (129623177358).

Almost surely, 2^{1020221221111} is an apocalyptic number.

1020221221111 is a deficient number, since it is larger than the sum of its proper divisors (16764197753).

1020221221111 is an equidigital number, since it uses as much as digits as its factorization.

1020221221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633281.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1020221221111 its reverse (1111221220201), we get a palindrome (2131442441312).

The spelling of 1020221221111 in words is "one trillion, twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".