20121131133030 has 32 divisors (see below), whose sum is σ = 48297774225888. Its totient is φ = 5364850579200.

The previous prime is 20121131133013. The next prime is 20121131133031. The reversal of 20121131133030 is 3033113112102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20121131132988 and 20121131133006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121131133031) 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, 48815701 + ... + 49226160.

It is an arithmetic number, because the mean of its divisors is an integer number (1509305444559).

Almost surely, 2^{20121131133030} is an apocalyptic number.

20121131133030 is an abundant number, since it is smaller than the sum of its proper divisors (28176643092858).

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

20121131133030 is a wasteful number, since it uses less digits than its factorization.

20121131133030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98048712.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 20121131133030 its reverse (3033113112102), we get a palindrome (23154244245132).

The spelling of 20121131133030 in words is "twenty trillion, one hundred twenty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, thirty".