1011211221101 has 4 divisors (see below), whose sum is σ = 1028350394400. Its totient is φ = 994072047804.

The previous prime is 1011211221043. The next prime is 1011211221127. The reversal of 1011211221101 is 1011221121101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011211221101 - 2³⁰ = 1010137479277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211221151) 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, 8569586561 + ... + 8569586678.

It is an arithmetic number, because the mean of its divisors is an integer number (257087598600).

Almost surely, 2^{1011211221101} is an apocalyptic number.

It is an amenable number.

1011211221101 is a deficient number, since it is larger than the sum of its proper divisors (17139173299).

1011211221101 is an equidigital number, since it uses as much as digits as its factorization.

1011211221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17139173298.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1011211221101 its reverse (1011221121101), we get a palindrome (2022432342202).

It can be divided in two parts, 1011 and 211221101, that added together give a palindrome (211222112).

The spelling of 1011211221101 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, one hundred one".