1011211101223 has 4 divisors (see below), whose sum is σ = 1011232474560. Its totient is φ = 1011189727888.

The previous prime is 1011211101217. The next prime is 1011211101239. The reversal of 1011211101223 is 3221011121101.

It is a happy number.

1011211101223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011211101223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011211101197 and 1011211101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211101623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10615543 + ... + 10710376.

It is an arithmetic number, because the mean of its divisors is an integer number (252808118640).

Almost surely, 2^{1011211101223} is an apocalyptic number.

1011211101223 is a deficient number, since it is larger than the sum of its proper divisors (21373337).

1011211101223 is an equidigital number, since it uses as much as digits as its factorization.

1011211101223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21373336.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1011211101223 its reverse (3221011121101), we get a palindrome (4232222222324).

The spelling of 1011211101223 in words is "one trillion, eleven billion, two hundred eleven million, one hundred one thousand, two hundred twenty-three".