20120131133 has 2 divisors, whose sum is σ = 20120131134. Its totient is φ = 20120131132.

The previous prime is 20120131123. The next prime is 20120131151. The reversal of 20120131133 is 33113102102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19659685369 + 460445764 = 140213^2 + 21458^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120131133 - 2⁴ = 20120131117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120131103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060065566 + 10060065567.

It is an arithmetic number, because the mean of its divisors is an integer number (10060065567).

Almost surely, 2^20120131133 is an apocalyptic number.

It is an amenable number.

20120131133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120131133 is an equidigital number, since it uses as much as digits as its factorization.

20120131133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20120131133 its reverse (33113102102), we get a palindrome (53233233235).

The spelling of 20120131133 in words is "twenty billion, one hundred twenty million, one hundred thirty-one thousand, one hundred thirty-three".