1121011121020 has 144 divisors (see below), whose sum is σ = 2754019372608. Its totient is φ = 382170270720.

The previous prime is 1121011120993. The next prime is 1121011121039. The reversal of 1121011121020 is 201211101211.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138512094 + ... + 138520186.

It is an arithmetic number, because the mean of its divisors is an integer number (19125134532).

Almost surely, 2^{1121011121020} is an apocalyptic number.

1121011121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121011121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377009686304).

1121011121020 is an abundant number, since it is smaller than the sum of its proper divisors (1633008251588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121011121020 is a wasteful number, since it uses less digits than its factorization.

1121011121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8900 (or 8891 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121011121020 its reverse (201211101211), we get a palindrome (1322222222231).

The spelling of 1121011121020 in words is "one trillion, one hundred twenty-one billion, eleven million, one hundred twenty-one thousand, twenty".