1011111212223 has 24 divisors (see below), whose sum is σ = 1696498860576. Its totient is φ = 568306065600.

The previous prime is 1011111212141. The next prime is 1011111212231. The reversal of 1011111212223 is 3222121111101.

It is a happy number.

It is not a de Polignac number, because 1011111212223 - 2⁸ = 1011111211967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011111212196 and 1011111212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011111212123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131548488 + ... + 131556173.

It is an arithmetic number, because the mean of its divisors is an integer number (70687452524).

Almost surely, 2^{1011111212223} is an apocalyptic number.

1011111212223 is a deficient number, since it is larger than the sum of its proper divisors (685387648353).

1011111212223 is a wasteful number, since it uses less digits than its factorization.

1011111212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263104735 (or 263104732 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1011111212223 its reverse (3222121111101), we get a palindrome (4233232323324).

The spelling of 1011111212223 in words is "one trillion, eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-three".