1021011111223 has 2 divisors, whose sum is σ = 1021011111224. Its totient is φ = 1021011111222.

The previous prime is 1021011111181. The next prime is 1021011111229. The reversal of 1021011111223 is 3221111101201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021011111223 - 2³³ = 1012421176631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021011111197 and 1021011111206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021011111229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510505555611 + 510505555612.

It is an arithmetic number, because the mean of its divisors is an integer number (510505555612).

Almost surely, 2^{1021011111223} is an apocalyptic number.

1021011111223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021011111223 is an equidigital number, since it uses as much as digits as its factorization.

1021011111223 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1021011111223 its reverse (3221111101201), we get a palindrome (4242122212424).

The spelling of 1021011111223 in words is "one trillion, twenty-one billion, eleven million, one hundred eleven thousand, two hundred twenty-three".