1201221011201 has 4 divisors (see below), whose sum is σ = 1253448011712. Its totient is φ = 1148994010692.

The previous prime is 1201221011197. The next prime is 1201221011231. The reversal of 1201221011201 is 1021101221021.

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 1201221011201 - 2² = 1201221011197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1201221011231) 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, 26113500221 + ... + 26113500266.

It is an arithmetic number, because the mean of its divisors is an integer number (313362002928).

Almost surely, 2^{1201221011201} is an apocalyptic number.

It is an amenable number.

1201221011201 is a deficient number, since it is larger than the sum of its proper divisors (52227000511).

1201221011201 is an equidigital number, since it uses as much as digits as its factorization.

1201221011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52227000510.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201221011201 its reverse (1021101221021), we get a palindrome (2222322232222).

The spelling of 1201221011201 in words is "one trillion, two hundred one billion, two hundred twenty-one million, eleven thousand, two hundred one".