20210120012111 has 4 divisors (see below), whose sum is σ = 20210166665832. Its totient is φ = 20210073358392.

The previous prime is 20210120012101. The next prime is 20210120012143. The reversal of 20210120012111 is 11121002101202.

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 20210120012111 - 2¹⁰ = 20210120011087 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 (20210120012101) 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, 22670921 + ... + 23545506.

It is an arithmetic number, because the mean of its divisors is an integer number (5052541666458).

Almost surely, 2^{20210120012111} is an apocalyptic number.

20210120012111 is a deficient number, since it is larger than the sum of its proper divisors (46653721).

20210120012111 is an equidigital number, since it uses as much as digits as its factorization.

20210120012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46653720.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20210120012111 its reverse (11121002101202), we get a palindrome (31331122113313).

The spelling of 20210120012111 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, twelve thousand, one hundred eleven".