1200501200081 has 4 divisors (see below), whose sum is σ = 1213989977700. Its totient is φ = 1187012422464.

The previous prime is 1200501200077. The next prime is 1200501200083. The reversal of 1200501200081 is 1800021050021.

It is a happy number.

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 785873385025 + 414627815056 = 886495^2 + 643916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200501200081 - 2² = 1200501200077 is a prime.

It is a super-2 number, since 2×1200501200081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200501200083) 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, 6744388676 + ... + 6744388853.

It is an arithmetic number, because the mean of its divisors is an integer number (303497494425).

Almost surely, 2^{1200501200081} is an apocalyptic number.

It is an amenable number.

1200501200081 is a deficient number, since it is larger than the sum of its proper divisors (13488777619).

1200501200081 is an equidigital number, since it uses as much as digits as its factorization.

1200501200081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13488777618.

The product of its (nonzero) digits is 160, while the sum is 20.

The spelling of 1200501200081 in words is "one trillion, two hundred billion, five hundred one million, two hundred thousand, eighty-one".