1120121001220 has 96 divisors (see below), whose sum is σ = 2747628457056. Its totient is φ = 379760640000.

The previous prime is 1120121001211. The next prime is 1120121001247. The reversal of 1120121001220 is 221001210211.

It can be written as a sum of positive squares in 16 ways, for example, as 195631059204 + 924489942016 = 442302^2 + 961504^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 1120121001220.

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, 2909281 + ... + 3271720.

It is an arithmetic number, because the mean of its divisors is an integer number (28621129761).

Almost surely, 2^{1120121001220} is an apocalyptic number.

1120121001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1120121001220 is an abundant number, since it is smaller than the sum of its proper divisors (1627507455836).

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

1120121001220 is a wasteful number, since it uses less digits than its factorization.

1120121001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6181081 (or 6181079 counting only the distinct ones).

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

Adding to 1120121001220 its reverse (221001210211), we get a palindrome (1341122211431).

The spelling of 1120121001220 in words is "one trillion, one hundred twenty billion, one hundred twenty-one million, one thousand, two hundred twenty".