1100121021442 has 4 divisors (see below), whose sum is σ = 1650181532166. Its totient is φ = 550060510720.

The previous prime is 1100121021409. The next prime is 1100121021449. The reversal of 1100121021442 is 2441201210011.

It is a happy number.

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., 784480432681 + 315640588761 = 885709^2 + 561819^2 .

It is not an unprimeable number, because it can be changed into a prime (1100121021449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275030255359 + ... + 275030255362.

Almost surely, 2^{1100121021442} is an apocalyptic number.

1100121021442 is a deficient number, since it is larger than the sum of its proper divisors (550060510724).

1100121021442 is an equidigital number, since it uses as much as digits as its factorization.

1100121021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550060510723.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1100121021442 its reverse (2441201210011), we get a palindrome (3541322231453).

The spelling of 1100121021442 in words is "one trillion, one hundred billion, one hundred twenty-one million, twenty-one thousand, four hundred forty-two".