1201143508077 has 4 divisors (see below), whose sum is σ = 1601524677440. Its totient is φ = 800762338716.

The previous prime is 1201143508057. The next prime is 1201143508079. The reversal of 1201143508077 is 7708053411021.

It is a happy number.

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 not a de Polignac number, because 1201143508077 - 2¹⁸ = 1201143245933 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 (1201143508079) 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, 200190584677 + ... + 200190584682.

It is an arithmetic number, because the mean of its divisors is an integer number (400381169360).

Almost surely, 2^{1201143508077} is an apocalyptic number.

It is an amenable number.

1201143508077 is a deficient number, since it is larger than the sum of its proper divisors (400381169363).

1201143508077 is an equidigital number, since it uses as much as digits as its factorization.

1201143508077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400381169362.

The product of its (nonzero) digits is 47040, while the sum is 39.

Adding to 1201143508077 its reverse (7708053411021), we get a palindrome (8909196919098).

The spelling of 1201143508077 in words is "one trillion, two hundred one billion, one hundred forty-three million, five hundred eight thousand, seventy-seven".