1201011120021 has 4 divisors (see below), whose sum is σ = 1601348160032. Its totient is φ = 800674080012.

The previous prime is 1201011120013. The next prime is 1201011120119. The reversal of 1201011120021 is 1200211101021.

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 1201011120021 - 2³ = 1201011120013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201011119979 and 1201011120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201011120011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200168520001 + ... + 200168520006.

It is an arithmetic number, because the mean of its divisors is an integer number (400337040008).

Almost surely, 2^{1201011120021} is an apocalyptic number.

It is an amenable number.

1201011120021 is a deficient number, since it is larger than the sum of its proper divisors (400337040011).

1201011120021 is an equidigital number, since it uses as much as digits as its factorization.

1201011120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400337040010.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201011120021 its reverse (1200211101021), we get a palindrome (2401222221042).

The spelling of 1201011120021 in words is "one trillion, two hundred one billion, eleven million, one hundred twenty thousand, twenty-one".