2011021010001 has 48 divisors (see below), whose sum is σ = 3187029231360. Its totient is φ = 1217871768960.

The previous prime is 2011021009997. The next prime is 2011021010021. The reversal of 2011021010001 is 1000101201102.

It is a happy number.

It is not a de Polignac number, because 2011021010001 - 2² = 2011021009997 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (2011021010021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2379741 + ... + 3112106.

It is an arithmetic number, because the mean of its divisors is an integer number (66396442320).

Almost surely, 2^{2011021010001} is an apocalyptic number.

It is an amenable number.

2011021010001 is a deficient number, since it is larger than the sum of its proper divisors (1176008221359).

2011021010001 is a wasteful number, since it uses less digits than its factorization.

2011021010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491966 (or 5491963 counting only the distinct ones).

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

Adding to 2011021010001 its reverse (1000101201102), we get a palindrome (3011122211103).

The spelling of 2011021010001 in words is "two trillion, eleven billion, twenty-one million, ten thousand, one".