1201002001011 has 16 divisors (see below), whose sum is σ = 1804322257920. Its totient is φ = 789390985320.

The previous prime is 1201002000997. The next prime is 1201002001039. The reversal of 1201002001011 is 1101002001021.

It is a happy number.

It is not a de Polignac number, because 1201002001011 - 2²⁹ = 1200465130099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1201002000984 and 1201002001002.

It is not an unprimeable number, because it can be changed into a prime (1201002001811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313248475 + ... + 313252308.

It is an arithmetic number, because the mean of its divisors is an integer number (112770141120).

Almost surely, 2^{1201002001011} is an apocalyptic number.

1201002001011 is a deficient number, since it is larger than the sum of its proper divisors (603320256909).

1201002001011 is an equidigital number, since it uses as much as digits as its factorization.

1201002001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626500863 (or 626500857 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1201002001011 its reverse (1101002001021), we get a palindrome (2302004002032).

The spelling of 1201002001011 in words is "one trillion, two hundred one billion, two million, one thousand, eleven".