2011111020021 has 8 divisors (see below), whose sum is σ = 2689077625920. Its totient is φ = 1336942547072.

The previous prime is 2011111020007. The next prime is 2011111020031. The reversal of 2011111020021 is 1200201111102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011111020021 - 2¹¹ = 2011111017973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011111019979 and 2011111020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111020031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949532001 + ... + 949534118.

It is an arithmetic number, because the mean of its divisors is an integer number (336134703240).

Almost surely, 2^{2011111020021} is an apocalyptic number.

It is an amenable number.

2011111020021 is a deficient number, since it is larger than the sum of its proper divisors (677966605899).

2011111020021 is a wasteful number, since it uses less digits than its factorization.

2011111020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899066475.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2011111020021 its reverse (1200201111102), we get a palindrome (3211312131123).

The spelling of 2011111020021 in words is "two trillion, eleven billion, one hundred eleven million, twenty thousand, twenty-one".