2011111022021 has 4 divisors (see below), whose sum is σ = 2011120612032. Its totient is φ = 2011101432012.

The previous prime is 2011111022009. The next prime is 2011111022023. The reversal of 2011111022021 is 1202201111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011111022021 is a prime.

It is a super-2 number, since 2×2011111022021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111021987 and 2011111022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111022023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4473245 + ... + 4902258.

It is an arithmetic number, because the mean of its divisors is an integer number (502780153008).

Almost surely, 2^{2011111022021} is an apocalyptic number.

It is an amenable number.

2011111022021 is a deficient number, since it is larger than the sum of its proper divisors (9590011).

2011111022021 is an equidigital number, since it uses as much as digits as its factorization.

2011111022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9590010.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011111022021 its reverse (1202201111102), we get a palindrome (3213312133123).

The spelling of 2011111022021 in words is "two trillion, eleven billion, one hundred eleven million, twenty-two thousand, twenty-one".