20012101110 has 64 divisors (see below), whose sum is σ = 53503070400. Its totient is φ = 5322813696.

The previous prime is 20012101103. The next prime is 20012101117. The reversal of 20012101110 is 1110121002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20012101103) and next prime (20012101117).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20012101092 and 20012101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012101117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9762 + ... + 200298.

It is an arithmetic number, because the mean of its divisors is an integer number (835985475).

Almost surely, 2^20012101110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012101110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26751535200).

20012101110 is an abundant number, since it is smaller than the sum of its proper divisors (33490969290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20012101110 is a wasteful number, since it uses less digits than its factorization.

20012101110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190942 (or 190936 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20012101110 its reverse (1110121002), we get a palindrome (21122222112).

The spelling of 20012101110 in words is "twenty billion, twelve million, one hundred one thousand, one hundred ten".