1022111221 has 8 divisors (see below), whose sum is σ = 1041717600. Its totient is φ = 1002581040.

The previous prime is 1022111171. The next prime is 1022111257. The reversal of 1022111221 is 1221112201.

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 1022111221 - 2¹⁷ = 1021980149 is a prime.

It is a super-2 number, since 2×1022111221² = 2089422696188221682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022111521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8410 + ... + 45988.

It is an arithmetic number, because the mean of its divisors is an integer number (130214700).

Almost surely, 2^1022111221 is an apocalyptic number.

It is an amenable number.

1022111221 is a deficient number, since it is larger than the sum of its proper divisors (19606379).

1022111221 is an equidigital number, since it uses as much as digits as its factorization.

1022111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38099.

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

The square root of 1022111221 is about 31970.4742066801. The cubic root of 1022111221 is about 1007.3167417240.

Adding to 1022111221 its reverse (1221112201), we get a palindrome (2243223422).

The spelling of 1022111221 in words is "one billion, twenty-two million, one hundred eleven thousand, two hundred twenty-one".