2011111121021 has 8 divisors (see below), whose sum is σ = 2088416730624. Its totient is φ = 1934582452560.

The previous prime is 2011111120913. The next prime is 2011111121023. The reversal of 2011111121021 is 1201211111102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011111121021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111120987 and 2011111121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111121023) 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, 194230010 + ... + 194240363.

It is an arithmetic number, because the mean of its divisors is an integer number (261052091328).

Almost surely, 2^{2011111121021} is an apocalyptic number.

It is an amenable number.

2011111121021 is a deficient number, since it is larger than the sum of its proper divisors (77305609603).

2011111121021 is a wasteful number, since it uses less digits than its factorization.

2011111121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388470571.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2011111121021 its reverse (1201211111102), we get a palindrome (3212322232123).

The spelling of 2011111121021 in words is "two trillion, eleven billion, one hundred eleven million, one hundred twenty-one thousand, twenty-one".