1121222001220 has 48 divisors (see below), whose sum is σ = 2404803582720. Its totient is φ = 438920889344.

The previous prime is 1121222001197. The next prime is 1121222001257. The reversal of 1121222001220 is 221002221211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1121222001194 and 1121222001203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28828227 + ... + 28867093.

It is an arithmetic number, because the mean of its divisors is an integer number (50100074640).

Almost surely, 2^{1121222001220} is an apocalyptic number.

1121222001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121222001220 is an abundant number, since it is smaller than the sum of its proper divisors (1283581581500).

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

1121222001220 is a wasteful number, since it uses less digits than its factorization.

1121222001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69612 (or 69610 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1121222001220 its reverse (221002221211), we get a palindrome (1342224222431).

The spelling of 1121222001220 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-two million, one thousand, two hundred twenty".