1011011221123 has 2 divisors, whose sum is σ = 1011011221124. Its totient is φ = 1011011221122.

The previous prime is 1011011221093. The next prime is 1011011221133. The reversal of 1011011221123 is 3211221101101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011011221123 - 2²⁵ = 1010977666691 is a prime.

It is a super-2 number, since 2×1011011221123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011011221097 and 1011011221106.

It is not a weakly prime, because it can be changed into another prime (1011011221133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505505610561 + 505505610562.

It is an arithmetic number, because the mean of its divisors is an integer number (505505610562).

Almost surely, 2^{1011011221123} is an apocalyptic number.

1011011221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011011221123 is an equidigital number, since it uses as much as digits as its factorization.

1011011221123 is an evil number, because the sum of its binary digits is even.

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

Adding to 1011011221123 its reverse (3211221101101), we get a palindrome (4222232322224).

The spelling of 1011011221123 in words is "one trillion, eleven billion, eleven million, two hundred twenty-one thousand, one hundred twenty-three".