20212123100111 has 8 divisors (see below), whose sum is σ = 20554865197200. Its totient is φ = 19869386461120.

The previous prime is 20212123100107. The next prime is 20212123100123. The reversal of 20212123100111 is 11100132121202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20212123100111 - 2² = 20212123100107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212123100111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212123100161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6484091 + ... + 9081171.

It is an arithmetic number, because the mean of its divisors is an integer number (2569358149650).

Almost surely, 2^{20212123100111} is an apocalyptic number.

20212123100111 is a deficient number, since it is larger than the sum of its proper divisors (342742097089).

20212123100111 is a wasteful number, since it uses less digits than its factorization.

20212123100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729049.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20212123100111 its reverse (11100132121202), we get a palindrome (31312255221313).

The spelling of 20212123100111 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-three million, one hundred thousand, one hundred eleven".