20311121130 has 32 divisors (see below), whose sum is σ = 48784896000. Its totient is φ = 5412053952.

The previous prime is 20311121113. The next prime is 20311121137. The reversal of 20311121130 is 3112111302.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20311121137) 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, 226305 + ... + 303044.

It is an arithmetic number, because the mean of its divisors is an integer number (1524528000).

Almost surely, 2^20311121130 is an apocalyptic number.

20311121130 is an abundant number, since it is smaller than the sum of its proper divisors (28473774870).

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

20311121130 is a wasteful number, since it uses less digits than its factorization.

20311121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530638.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20311121130 its reverse (3112111302), we get a palindrome (23423232432).

The spelling of 20311121130 in words is "twenty billion, three hundred eleven million, one hundred twenty-one thousand, one hundred thirty".