1011121102091 has 4 divisors (see below), whose sum is σ = 1011123148800. Its totient is φ = 1011119055384.

The previous prime is 1011121102049. The next prime is 1011121102151. The reversal of 1011121102091 is 1902011211101.

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 1011121102091 - 2⁶ = 1011121102027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011121102001) 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, 226550 + ... + 1439988.

It is an arithmetic number, because the mean of its divisors is an integer number (252780787200).

Almost surely, 2^{1011121102091} is an apocalyptic number.

1011121102091 is a deficient number, since it is larger than the sum of its proper divisors (2046709).

1011121102091 is an equidigital number, since it uses as much as digits as its factorization.

1011121102091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046708.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 1011121102091 its reverse (1902011211101), we get a palindrome (2913132313192).

The spelling of 1011121102091 in words is "one trillion, eleven billion, one hundred twenty-one million, one hundred two thousand, ninety-one".