20121122010111 has 4 divisors (see below), whose sum is σ = 26828162680152. Its totient is φ = 13414081340072.

The previous prime is 20121122010029. The next prime is 20121122010113. The reversal of 20121122010111 is 11101022112102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121122010111 - 2⁷ = 20121122009983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121122010113) 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, 3353520335016 + ... + 3353520335021.

It is an arithmetic number, because the mean of its divisors is an integer number (6707040670038).

Almost surely, 2^{20121122010111} is an apocalyptic number.

20121122010111 is a deficient number, since it is larger than the sum of its proper divisors (6707040670041).

20121122010111 is an equidigital number, since it uses as much as digits as its factorization.

20121122010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707040670040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20121122010111 its reverse (11101022112102), we get a palindrome (31222144122213).

The spelling of 20121122010111 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, ten thousand, one hundred eleven".