1201111020331 has 4 divisors (see below), whose sum is σ = 1212130387600. Its totient is φ = 1190091653064.

The previous prime is 1201111020289. The next prime is 1201111020341. The reversal of 1201111020331 is 1330201111021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201111020331 - 2²⁹ = 1200574149419 is a prime.

It is a super-2 number, since 2×1201111020331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201111020341) 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, 5509683471 + ... + 5509683688.

It is an arithmetic number, because the mean of its divisors is an integer number (303032596900).

Almost surely, 2^{1201111020331} is an apocalyptic number.

1201111020331 is a deficient number, since it is larger than the sum of its proper divisors (11019367269).

1201111020331 is a wasteful number, since it uses less digits than its factorization.

1201111020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11019367268.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1201111020331 its reverse (1330201111021), we get a palindrome (2531312131352).

The spelling of 1201111020331 in words is "one trillion, two hundred one billion, one hundred eleven million, twenty thousand, three hundred thirty-one".