1201331319 has 4 divisors (see below), whose sum is σ = 1601775096. Its totient is φ = 800887544.

The previous prime is 1201331311. The next prime is 1201331357. The reversal of 1201331319 is 9131331021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201331319 - 2³ = 1201331311 is a prime.

It is a super-2 number, since 2×1201331319² = 2886393876020559522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201331311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200221884 + ... + 200221889.

It is an arithmetic number, because the mean of its divisors is an integer number (400443774).

Almost surely, 2^1201331319 is an apocalyptic number.

1201331319 is a deficient number, since it is larger than the sum of its proper divisors (400443777).

1201331319 is an equidigital number, since it uses as much as digits as its factorization.

1201331319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400443776.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 1201331319 is about 34660.2267592121. The cubic root of 1201331319 is about 1063.0514065939.

It can be divided in two parts, 1201 and 331319, that added together give a triangular number (332520 = T₈₁₅).

The spelling of 1201331319 in words is "one billion, two hundred one million, three hundred thirty-one thousand, three hundred nineteen".