1111021121091 has 16 divisors (see below), whose sum is σ = 1701492032000. Its totient is φ = 631678912128.

The previous prime is 1111021121083. The next prime is 1111021121141. The reversal of 1111021121091 is 1901211201111.

It is a happy number.

It is not a de Polignac number, because 1111021121091 - 2³ = 1111021121083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111021121491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132924886 + ... + 132933243.

It is an arithmetic number, because the mean of its divisors is an integer number (106343252000).

Almost surely, 2^{1111021121091} is an apocalyptic number.

1111021121091 is a deficient number, since it is larger than the sum of its proper divisors (590470910909).

1111021121091 is a wasteful number, since it uses less digits than its factorization.

1111021121091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265858338.

The product of its (nonzero) digits is 36, while the sum is 21.

The spelling of 1111021121091 in words is "one trillion, one hundred eleven billion, twenty-one million, one hundred twenty-one thousand, ninety-one".