20121112230 has 32 divisors (see below), whose sum is σ = 48298205664. Its totient is φ = 5364792576.

The previous prime is 20121112223. The next prime is 20121112243. The reversal of 20121112230 is 3221112102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156804 + ... + 254616.

It is an arithmetic number, because the mean of its divisors is an integer number (1509318927).

Almost surely, 2^20121112230 is an apocalyptic number.

20121112230 is an abundant number, since it is smaller than the sum of its proper divisors (28177093434).

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

20121112230 is a wasteful number, since it uses less digits than its factorization.

20121112230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104680.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20121112230 its reverse (3221112102), we get a palindrome (23342224332).

The spelling of 20121112230 in words is "twenty billion, one hundred twenty-one million, one hundred twelve thousand, two hundred thirty".