20121131054 has 16 divisors (see below), whose sum is σ = 30967861680. Its totient is φ = 9799304640.

The previous prime is 20121131053. The next prime is 20121131059. The reversal of 20121131054 is 45013112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121131053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147449 + ... + 248964.

It is an arithmetic number, because the mean of its divisors is an integer number (1935491355).

Almost surely, 2^20121131054 is an apocalyptic number.

20121131054 is a deficient number, since it is larger than the sum of its proper divisors (10846730626).

20121131054 is a wasteful number, since it uses less digits than its factorization.

20121131054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397075.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 20121131054 its reverse (45013112102), we get a palindrome (65134243156).

The spelling of 20121131054 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-one thousand, fifty-four".