1199121009901 has 4 divisors (see below), whose sum is σ = 1199728777212. Its totient is φ = 1198513242592.

The previous prime is 1199121009893. The next prime is 1199121009913. The reversal of 1199121009901 is 1099001219911.

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

It can be written as a sum of positive squares in 2 ways, for example, as 588419397225 + 610701612676 = 767085^2 + 781474^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199121009901 - 2³ = 1199121009893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199121009971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303880696 + ... + 303884641.

It is an arithmetic number, because the mean of its divisors is an integer number (299932194303).

Almost surely, 2^{1199121009901} is an apocalyptic number.

It is an amenable number.

1199121009901 is a deficient number, since it is larger than the sum of its proper divisors (607767311).

1199121009901 is an equidigital number, since it uses as much as digits as its factorization.

1199121009901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607767310.

The product of its (nonzero) digits is 13122, while the sum is 43.

The spelling of 1199121009901 in words is "one trillion, one hundred ninety-nine billion, one hundred twenty-one million, nine thousand, nine hundred one".