20131121130 has 32 divisors (see below), whose sum is σ = 48667362624. Its totient is φ = 5329113216.

The previous prime is 20131121117. The next prime is 20131121141. The reversal of 20131121130 is 3112113102.

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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2444932 + ... + 2453151.

It is an arithmetic number, because the mean of its divisors is an integer number (1520855082).

Almost surely, 2^20131121130 is an apocalyptic number.

20131121130 is an abundant number, since it is smaller than the sum of its proper divisors (28536241494).

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

20131121130 is a wasteful number, since it uses less digits than its factorization.

20131121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898230.

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

Adding to 20131121130 its reverse (3112113102), we get a palindrome (23243234232).

The spelling of 20131121130 in words is "twenty billion, one hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty".