1121001001002 has 24 divisors (see below), whose sum is σ = 2428868244036. Its totient is φ = 373661963136.

The previous prime is 1121001000991. The next prime is 1121001001007. The reversal of 1121001001002 is 2001001001211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1079356844241 + 41644156761 = 1038921^2 + 204069^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1121001001007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1101618 + ... + 1858914.

Almost surely, 2^{1121001001002} is an apocalyptic number.

1121001001002 is an abundant number, since it is smaller than the sum of its proper divisors (1307867243034).

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

1121001001002 is a wasteful number, since it uses less digits than its factorization.

1121001001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839542 (or 839539 counting only the distinct ones).

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

Adding to 1121001001002 its reverse (2001001001211), we get a palindrome (3122002002213).

The spelling of 1121001001002 in words is "one trillion, one hundred twenty-one billion, one million, one thousand, two".