1121020121020 has 48 divisors (see below), whose sum is σ = 2493145968768. Its totient is φ = 421942256640.

The previous prime is 1121020120991. The next prime is 1121020121099. The reversal of 1121020121020 is 201210201211.

It is a super-2 number, since 2×1121020121020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1281550 + ... + 1970890.

It is an arithmetic number, because the mean of its divisors is an integer number (51940541016).

Almost surely, 2^{1121020121020} is an apocalyptic number.

1121020121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121020121020 is an abundant number, since it is smaller than the sum of its proper divisors (1372125847748).

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

1121020121020 is a wasteful number, since it uses less digits than its factorization.

1121020121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694150 (or 694148 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1121020121020 its reverse (201210201211), we get a palindrome (1322230322231).

The spelling of 1121020121020 in words is "one trillion, one hundred twenty-one billion, twenty million, one hundred twenty-one thousand, twenty".