2111122021021 has 8 divisors (see below), whose sum is σ = 2273528434464. Its totient is φ = 1948717380720.

The previous prime is 2111122021013. The next prime is 2111122021033. The reversal of 2111122021021 is 1201202211112.

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 2111122021021 - 2³ = 2111122021013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111122020986 and 2111122021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111122021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3047970 + ... + 3675916.

It is an arithmetic number, because the mean of its divisors is an integer number (284191054308).

Almost surely, 2^{2111122021021} is an apocalyptic number.

It is an amenable number.

2111122021021 is a deficient number, since it is larger than the sum of its proper divisors (162406413443).

2111122021021 is a wasteful number, since it uses less digits than its factorization.

2111122021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886571.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111122021021 its reverse (1201202211112), we get a palindrome (3312324232133).

The spelling of 2111122021021 in words is "two trillion, one hundred eleven billion, one hundred twenty-two million, twenty-one thousand, twenty-one".