1121002010100 has 216 divisors, whose sum is σ = 4053210452928. Its totient is φ = 253834214400.

The previous prime is 1121002010017. The next prime is 1121002010171. The reversal of 1121002010100 is 10102001211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 157381 + ... + 1505580.

It is an arithmetic number, because the mean of its divisors is an integer number (18764863208).

Almost surely, 2^{1121002010100} is an apocalyptic number.

1121002010100 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 1121002010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026605226464).

1121002010100 is an abundant number, since it is smaller than the sum of its proper divisors (2932208442828).

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

1121002010100 is a wasteful number, since it uses less digits than its factorization.

1121002010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663095 (or 1663085 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1121002010100 its reverse (10102001211), we get a palindrome (1131104011311).

The spelling of 1121002010100 in words is "one trillion, one hundred twenty-one billion, two million, ten thousand, one hundred".