20110101240 has 64 divisors (see below), whose sum is σ = 60377788800. Its totient is φ = 5358472832.

The previous prime is 20110101217. The next prime is 20110101241. The reversal of 20110101240 is 4210101102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110101241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88651 + ... + 219269.

It is an arithmetic number, because the mean of its divisors is an integer number (943402950).

Almost surely, 2^20110101240 is an apocalyptic number.

20110101240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110101240 is an abundant number, since it is smaller than the sum of its proper divisors (40267687560).

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

20110101240 is a wasteful number, since it uses less digits than its factorization.

20110101240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131916 (or 131912 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20110101240 its reverse (4210101102), we get a palindrome (24320202342).

The spelling of 20110101240 in words is "twenty billion, one hundred ten million, one hundred one thousand, two hundred forty".