20123221130 has 32 divisors (see below), whose sum is σ = 38468468160. Its totient is φ = 7552892160.

The previous prime is 20123221123. The next prime is 20123221211. The reversal of 20123221130 is 3112232102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 20123221099 and 20123221108.

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, 122540 + ... + 235079.

It is an arithmetic number, because the mean of its divisors is an integer number (1202139630).

Almost surely, 2^20123221130 is an apocalyptic number.

20123221130 is a deficient number, since it is larger than the sum of its proper divisors (18345247030).

20123221130 is a wasteful number, since it uses less digits than its factorization.

20123221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357974.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20123221130 its reverse (3112232102), we get a palindrome (23235453232).

The spelling of 20123221130 in words is "twenty billion, one hundred twenty-three million, two hundred twenty-one thousand, one hundred thirty".