1201201111001 has 4 divisors (see below), whose sum is σ = 1201204866432. Its totient is φ = 1201197355572.

The previous prime is 1201201110973. The next prime is 1201201111013. The reversal of 1201201111001 is 1001111021021.

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 1201201111001 - 2¹⁸ = 1201200848857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201201111051) 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, 1348145 + ... + 2054238.

It is an arithmetic number, because the mean of its divisors is an integer number (300301216608).

Almost surely, 2^{1201201111001} is an apocalyptic number.

It is an amenable number.

1201201111001 is a deficient number, since it is larger than the sum of its proper divisors (3755431).

1201201111001 is an equidigital number, since it uses as much as digits as its factorization.

1201201111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755430.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1201201111001 its reverse (1001111021021), we get a palindrome (2202312132022).

The spelling of 1201201111001 in words is "one trillion, two hundred one billion, two hundred one million, one hundred eleven thousand, one".