1000122021120 has 144 divisors (see below), whose sum is σ = 3230030018880. Its totient is φ = 263702495232.

The previous prime is 1000122021103. The next prime is 1000122021121. The reversal of 1000122021120 is 211202210001.

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 = 1000122021096 and 1000122021105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000122021121) 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, 1121434 + ... + 1804953.

It is an arithmetic number, because the mean of its divisors is an integer number (22430764020).

Almost surely, 2^{1000122021120} is an apocalyptic number.

1000122021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000122021120 is an abundant number, since it is smaller than the sum of its proper divisors (2229907997760).

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

1000122021120 is an equidigital number, since it uses as much as digits as its factorization.

1000122021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926500 (or 2926486 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1000122021120 its reverse (211202210001), we get a palindrome (1211324231121).

The spelling of 1000122021120 in words is "one trillion, one hundred twenty-two million, twenty-one thousand, one hundred twenty".