20122113212111 has 4 divisors (see below), whose sum is σ = 20405523257424. Its totient is φ = 19838703166800.

The previous prime is 20122113212101. The next prime is 20122113212119. The reversal of 20122113212111 is 11121231122102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122113212111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122113212119) 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, 141705022550 + ... + 141705022691.

It is an arithmetic number, because the mean of its divisors is an integer number (5101380814356).

Almost surely, 2^{20122113212111} is an apocalyptic number.

20122113212111 is a deficient number, since it is larger than the sum of its proper divisors (283410045313).

20122113212111 is an equidigital number, since it uses as much as digits as its factorization.

20122113212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283410045312.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 20122113212111 its reverse (11121231122102), we get a palindrome (31243344334213).

The spelling of 20122113212111 in words is "twenty trillion, one hundred twenty-two billion, one hundred thirteen million, two hundred twelve thousand, one hundred eleven".