20200122121111 has 4 divisors (see below), whose sum is σ = 20200144231224. Its totient is φ = 20200100011000.

The previous prime is 20200122121073. The next prime is 20200122121133. The reversal of 20200122121111 is 11112122100202.

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 20200122121111 - 2¹⁵ = 20200122088343 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 (20200122121171) 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, 9622780 + ... + 11532481.

It is an arithmetic number, because the mean of its divisors is an integer number (5050036057806).

Almost surely, 2^{20200122121111} is an apocalyptic number.

20200122121111 is a deficient number, since it is larger than the sum of its proper divisors (22110113).

20200122121111 is an equidigital number, since it uses as much as digits as its factorization.

20200122121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22110112.

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

Adding to 20200122121111 its reverse (11112122100202), we get a palindrome (31312244221313).

The spelling of 20200122121111 in words is "twenty trillion, two hundred billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".