1201011000221 has 4 divisors (see below), whose sum is σ = 1201018051200. Its totient is φ = 1201003949244.

The previous prime is 1201011000193. The next prime is 1201011000223. The reversal of 1201011000221 is 1220001101021.

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 1201011000221 - 2²² = 1201006805917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201011000223) 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, 3263501 + ... + 3612818.

It is an arithmetic number, because the mean of its divisors is an integer number (300254512800).

Almost surely, 2^{1201011000221} is an apocalyptic number.

It is an amenable number.

1201011000221 is a deficient number, since it is larger than the sum of its proper divisors (7050979).

1201011000221 is an equidigital number, since it uses as much as digits as its factorization.

1201011000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7050978.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201011000221 its reverse (1220001101021), we get a palindrome (2421012101242).

The spelling of 1201011000221 in words is "one trillion, two hundred one billion, eleven million, two hundred twenty-one", and thus it is an aban number.