1121203311020 has 96 divisors (see below), whose sum is σ = 2734199858880. Its totient is φ = 382628413440.

The previous prime is 1121203310999. The next prime is 1121203311029. The reversal of 1121203311020 is 201133021211.

It is a self number, because there is not a number n which added to its sum of digits gives 1121203311020.

It is not an unprimeable number, because it can be changed into a prime (1121203311029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2565317 + ... + 2970396.

It is an arithmetic number, because the mean of its divisors is an integer number (28481248530).

Almost surely, 2^{1121203311020} is an apocalyptic number.

1121203311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121203311020 is an abundant number, since it is smaller than the sum of its proper divisors (1612996547860).

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

1121203311020 is a wasteful number, since it uses less digits than its factorization.

1121203311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535795 (or 5535793 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1121203311020 its reverse (201133021211), we get a palindrome (1322336332231).

The spelling of 1121203311020 in words is "one trillion, one hundred twenty-one billion, two hundred three million, three hundred eleven thousand, twenty".