20121131053 has 2 divisors, whose sum is σ = 20121131054. Its totient is φ = 20121131052.

The previous prime is 20121130999. The next prime is 20121131059. The reversal of 20121131053 is 35013112102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14607623044 + 5513508009 = 120862^2 + 74253^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121131053 - 2⁹ = 20121130541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20121131053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121131059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060565526 + 10060565527.

It is an arithmetic number, because the mean of its divisors is an integer number (10060565527).

Almost surely, 2^20121131053 is an apocalyptic number.

It is an amenable number.

20121131053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121131053 is an equidigital number, since it uses as much as digits as its factorization.

20121131053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 20121131053 its reverse (35013112102), we get a palindrome (55134243155).

The spelling of 20121131053 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-one thousand, fifty-three".