1203155212101 has 4 divisors (see below), whose sum is σ = 1604206949472. Its totient is φ = 802103474732.

The previous prime is 1203155212097. The next prime is 1203155212123. The reversal of 1203155212101 is 1012125513021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1203155212101 - 2² = 1203155212097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203155212201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200525868681 + ... + 200525868686.

It is an arithmetic number, because the mean of its divisors is an integer number (401051737368).

Almost surely, 2^{1203155212101} is an apocalyptic number.

It is an amenable number.

1203155212101 is a deficient number, since it is larger than the sum of its proper divisors (401051737371).

1203155212101 is an equidigital number, since it uses as much as digits as its factorization.

1203155212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401051737370.

The product of its (nonzero) digits is 600, while the sum is 24.

The spelling of 1203155212101 in words is "one trillion, two hundred three billion, one hundred fifty-five million, two hundred twelve thousand, one hundred one".