1121001111020 has 48 divisors (see below), whose sum is σ = 2807376703488. Its totient is φ = 367632661440.

The previous prime is 1121001111011. The next prime is 1121001111023. The reversal of 1121001111020 is 201111001211.

It is a junction number, because it is equal to n+sod(n) for n = 1121001110992 and 1121001111010.

It is not an unprimeable number, because it can be changed into a prime (1121001111023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174065276 + ... + 174071715.

It is an arithmetic number, because the mean of its divisors is an integer number (58487014656).

Almost surely, 2^{1121001111020} is an apocalyptic number.

1121001111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121001111020 is an abundant number, since it is smaller than the sum of its proper divisors (1686375592468).

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

1121001111020 is a wasteful number, since it uses less digits than its factorization.

1121001111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348137030 (or 348137028 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1121001111020 its reverse (201111001211), we get a palindrome (1322112112231).

The spelling of 1121001111020 in words is "one trillion, one hundred twenty-one billion, one million, one hundred eleven thousand, twenty".