20121022021111 has 48 divisors (see below), whose sum is σ = 23123736244224. Its totient is φ = 17477687304000.

The previous prime is 20121022021099. The next prime is 20121022021117. The reversal of 20121022021111 is 11112022012102.

It is not a de Polignac number, because 20121022021111 - 2⁹ = 20121022020599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121022021117) 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, 523543066 + ... + 523581496.

It is an arithmetic number, because the mean of its divisors is an integer number (481744505088).

Almost surely, 2^{20121022021111} is an apocalyptic number.

20121022021111 is a deficient number, since it is larger than the sum of its proper divisors (3002714223113).

20121022021111 is a wasteful number, since it uses less digits than its factorization.

20121022021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40684 (or 40673 counting only the distinct ones).

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

Adding to 20121022021111 its reverse (11112022012102), we get a palindrome (31233044033213).

Subtracting from 20121022021111 its reverse (11112022012102), we obtain a palindrome (9009000009009).

The spelling of 20121022021111 in words is "twenty trillion, one hundred twenty-one billion, twenty-two million, twenty-one thousand, one hundred eleven".