1201220221001 has 4 divisors (see below), whose sum is σ = 1201236575232. Its totient is φ = 1201203866772.

The previous prime is 1201220220979. The next prime is 1201220221037. The reversal of 1201220221001 is 1001220221021.

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 1201220221001 - 2³⁰ = 1200146479177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201220221301) 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, 8066441 + ... + 8214006.

It is an arithmetic number, because the mean of its divisors is an integer number (300309143808).

Almost surely, 2^{1201220221001} is an apocalyptic number.

It is an amenable number.

1201220221001 is a deficient number, since it is larger than the sum of its proper divisors (16354231).

1201220221001 is an equidigital number, since it uses as much as digits as its factorization.

1201220221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16354230.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201220221001 its reverse (1001220221021), we get a palindrome (2202440442022).

The spelling of 1201220221001 in words is "one trillion, two hundred one billion, two hundred twenty million, two hundred twenty-one thousand, one".