1121121221002 has 4 divisors (see below), whose sum is σ = 1681681831506. Its totient is φ = 560560610500.

The previous prime is 1121121220997. The next prime is 1121121221027. The reversal of 1121121221002 is 2001221211211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 768022624161 + 353098596841 = 876369^2 + 594221^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280280305249 + ... + 280280305252.

Almost surely, 2^{1121121221002} is an apocalyptic number.

1121121221002 is a deficient number, since it is larger than the sum of its proper divisors (560560610504).

1121121221002 is an equidigital number, since it uses as much as digits as its factorization.

1121121221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560560610503.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121121221002 its reverse (2001221211211), we get a palindrome (3122342432213).

The spelling of 1121121221002 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, two".