1201131320999 has 16 divisors (see below), whose sum is σ = 1268256890880. Its totient is φ = 1135319724000.

The previous prime is 1201131320981. The next prime is 1201131321053. The reversal of 1201131320999 is 9990231311021.

It is a cyclic number.

It is not a de Polignac number, because 1201131320999 - 2¹⁶ = 1201131255463 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 (1201131320929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85964 + ... + 1552305.

It is an arithmetic number, because the mean of its divisors is an integer number (79266055680).

Almost surely, 2^{1201131320999} is an apocalyptic number.

1201131320999 is a deficient number, since it is larger than the sum of its proper divisors (67125569881).

1201131320999 is a wasteful number, since it uses less digits than its factorization.

1201131320999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638670.

The product of its (nonzero) digits is 26244, while the sum is 41.

The spelling of 1201131320999 in words is "one trillion, two hundred one billion, one hundred thirty-one million, three hundred twenty thousand, nine hundred ninety-nine".