1011211221223 has 8 divisors (see below), whose sum is σ = 1155689628192. Its totient is φ = 866737729536.

The previous prime is 1011211221217. The next prime is 1011211221277. The reversal of 1011211221223 is 3221221121101.

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

It is not a de Polignac number, because 1011211221223 - 2⁵ = 1011211221191 is a prime.

It is a super-2 number, since 2×1011211221223² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011211221223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211221623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776890 + ... + 1620487.

It is an arithmetic number, because the mean of its divisors is an integer number (144461203524).

Almost surely, 2^{1011211221223} is an apocalyptic number.

1011211221223 is a deficient number, since it is larger than the sum of its proper divisors (144478406969).

1011211221223 is an equidigital number, since it uses as much as digits as its factorization.

1011211221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457641.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1011211221223 its reverse (3221221121101), we get a palindrome (4232432342324).

The spelling of 1011211221223 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-three".