1011200020001 has 4 divisors (see below), whose sum is σ = 1014773165232. Its totient is φ = 1007626874772.

The previous prime is 1011200019979. The next prime is 1011200020081. The reversal of 1011200020001 is 1000200021101.

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 1011200020001 - 2²² = 1011195825697 is a prime.

It is a super-3 number, since 3×1011200020001³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011200020081) 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, 1786572191 + ... + 1786572756.

It is an arithmetic number, because the mean of its divisors is an integer number (253693291308).

Almost surely, 2^{1011200020001} is an apocalyptic number.

It is an amenable number.

1011200020001 is a deficient number, since it is larger than the sum of its proper divisors (3573145231).

1011200020001 is an equidigital number, since it uses as much as digits as its factorization.

1011200020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573145230.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1011200020001 its reverse (1000200021101), we get a palindrome (2011400041102).

The spelling of 1011200020001 in words is "one trillion, eleven billion, two hundred million, twenty thousand, one".