1011123021113 has 4 divisors (see below), whose sum is σ = 1011142986468. Its totient is φ = 1011103055760.

The previous prime is 1011123021079. The next prime is 1011123021131. The reversal of 1011123021113 is 3111203211101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 261042311929 + 750080709184 = 510923^2 + 866072^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011123021113 - 2¹² = 1011123017017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011123021091 and 1011123021100.

It is not an unprimeable number, because it can be changed into a prime (1011123021173) 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, 9906518 + ... + 10008063.

It is an arithmetic number, because the mean of its divisors is an integer number (252785746617).

Almost surely, 2^{1011123021113} is an apocalyptic number.

It is an amenable number.

1011123021113 is a deficient number, since it is larger than the sum of its proper divisors (19965355).

1011123021113 is an equidigital number, since it uses as much as digits as its factorization.

1011123021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19965354.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1011123021113 its reverse (3111203211101), we get a palindrome (4122326232214).

The spelling of 1011123021113 in words is "one trillion, eleven billion, one hundred twenty-three million, twenty-one thousand, one hundred thirteen".