20121130998 has 32 divisors (see below), whose sum is σ = 44754664800. Its totient is φ = 6700887648.

The previous prime is 20121130949. The next prime is 20121130999. The reversal of 20121130998 is 89903112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121130999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111433 + ... + 229476.

It is an arithmetic number, because the mean of its divisors is an integer number (1398583275).

Almost surely, 2^20121130998 is an apocalyptic number.

20121130998 is an abundant number, since it is smaller than the sum of its proper divisors (24633533802).

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

20121130998 is a wasteful number, since it uses less digits than its factorization.

20121130998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342013 (or 342007 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 20121130998 in words is "twenty billion, one hundred twenty-one million, one hundred thirty thousand, nine hundred ninety-eight".