1122121000000 has 1568 divisors, whose sum is σ = 4000448793600. Its totient is φ = 300672000000.

The previous prime is 1122120999997. The next prime is 1122121000079. The reversal of 1122121000000 is 1212211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 19018999971 + ... + 19019000029.

Almost surely, 2^{1122121000000} is an apocalyptic number.

1122121000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122121000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2000224396800).

1122121000000 is an abundant number, since it is smaller than the sum of its proper divisors (2878327793600).

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

1122121000000 is an equidigital number, since it uses as much as digits as its factorization.

1122121000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1122121000000 its reverse (1212211), we get a palindrome (1122122212211).

The spelling of 1122121000000 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million", and thus it is an aban number.