1011123020211 has 4 divisors (see below), whose sum is σ = 1348164026952. Its totient is φ = 674082013472.

The previous prime is 1011123020209. The next prime is 1011123020227. The reversal of 1011123020211 is 1120203211101.

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

It is a cyclic number.

It is not a de Polignac number, because 1011123020211 - 2¹ = 1011123020209 is a prime.

It is a super-2 number, since 2×1011123020211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011123020261) 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, 168520503366 + ... + 168520503371.

It is an arithmetic number, because the mean of its divisors is an integer number (337041006738).

Almost surely, 2^{1011123020211} is an apocalyptic number.

1011123020211 is a deficient number, since it is larger than the sum of its proper divisors (337041006741).

1011123020211 is an equidigital number, since it uses as much as digits as its factorization.

1011123020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337041006740.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1011123020211 its reverse (1120203211101), we get a palindrome (2131326231312).

The spelling of 1011123020211 in words is "one trillion, eleven billion, one hundred twenty-three million, twenty thousand, two hundred eleven".