1121011001220 has 96 divisors (see below), whose sum is σ = 3445989434496. Its totient is φ = 270029260800.

The previous prime is 1121011001219. The next prime is 1121011001239. The reversal of 1121011001220 is 221001101211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1121011001196 and 1121011001205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5305621 + ... + 5512860.

It is an arithmetic number, because the mean of its divisors is an integer number (35895723276).

Almost surely, 2^{1121011001220} is an apocalyptic number.

1121011001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121011001220 is an abundant number, since it is smaller than the sum of its proper divisors (2324978433276).

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

1121011001220 is a wasteful number, since it uses less digits than its factorization.

1121011001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10818661 (or 10818659 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1121011001220 its reverse (221001101211), we get a palindrome (1342012102431).

Subtracting from 1121011001220 its reverse (221001101211), we obtain a palindrome (900009900009).

The spelling of 1121011001220 in words is "one trillion, one hundred twenty-one billion, eleven million, one thousand, two hundred twenty".