1067721198441 has 4 divisors (see below), whose sum is σ = 1423628264592. Its totient is φ = 711814132292.

The previous prime is 1067721198433. The next prime is 1067721198449. The reversal of 1067721198441 is 1448911277601.

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 an interprime number because it is at equal distance from previous prime (1067721198433) and next prime (1067721198449).

It is a cyclic number.

It is not a de Polignac number, because 1067721198441 - 2³ = 1067721198433 is a prime.

It is a super-3 number, since 3×1067721198441³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1067721198449) 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, 177953533071 + ... + 177953533076.

It is an arithmetic number, because the mean of its divisors is an integer number (355907066148).

Almost surely, 2^{1067721198441} is an apocalyptic number.

It is an amenable number.

1067721198441 is a deficient number, since it is larger than the sum of its proper divisors (355907066151).

1067721198441 is an equidigital number, since it uses as much as digits as its factorization.

1067721198441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355907066150.

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 1067721198441 in words is "one trillion, sixty-seven billion, seven hundred twenty-one million, one hundred ninety-eight thousand, four hundred forty-one".