1001002012011 has 40 divisors (see below), whose sum is σ = 1551926727120. Its totient is φ = 642223899072.

The previous prime is 1001002011983. The next prime is 1001002012013. The reversal of 1001002012011 is 1102102001001.

It is a happy number.

1001002012011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1001002012011 - 2¹⁹ = 1001001487723 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 = 1001002011984 and 1001002012002.

It is not an unprimeable number, because it can be changed into a prime (1001002012013) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27105 + ... + 1415181.

It is an arithmetic number, because the mean of its divisors is an integer number (38798168178).

Almost surely, 2^{1001002012011} is an apocalyptic number.

1001002012011 is a deficient number, since it is larger than the sum of its proper divisors (550924715109).

1001002012011 is a wasteful number, since it uses less digits than its factorization.

1001002012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388425 (or 1388416 counting only the distinct ones).

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

Adding to 1001002012011 its reverse (1102102001001), we get a palindrome (2103104013012).

The spelling of 1001002012011 in words is "one trillion, one billion, two million, twelve thousand, eleven".