1241155200121 has 4 divisors (see below), whose sum is σ = 1241171075700. Its totient is φ = 1241139324544.

The previous prime is 1241155200107. The next prime is 1241155200139. The reversal of 1241155200121 is 1210025511421.

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 1001240384400 + 239914815721 = 1000620^2 + 489811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241155200121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241155600121) 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, 7819936 + ... + 7977073.

It is an arithmetic number, because the mean of its divisors is an integer number (310292768925).

Almost surely, 2^{1241155200121} is an apocalyptic number.

It is an amenable number.

1241155200121 is a deficient number, since it is larger than the sum of its proper divisors (15875579).

1241155200121 is an equidigital number, since it uses as much as digits as its factorization.

1241155200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15875578.

The product of its (nonzero) digits is 800, while the sum is 25.

The spelling of 1241155200121 in words is "one trillion, two hundred forty-one billion, one hundred fifty-five million, two hundred thousand, one hundred twenty-one".