20120220312011 has 2 divisors, whose sum is σ = 20120220312012. Its totient is φ = 20120220312010.

The previous prime is 20120220312007. The next prime is 20120220312041. The reversal of 20120220312011 is 11021302202102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20120220312011 - 2² = 20120220312007 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20120220312041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060110156005 + 10060110156006.

It is an arithmetic number, because the mean of its divisors is an integer number (10060110156006).

Almost surely, 2^{20120220312011} is an apocalyptic number.

20120220312011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120220312011 is an equidigital number, since it uses as much as digits as its factorization.

20120220312011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20120220312011 its reverse (11021302202102), we get a palindrome (31141522514113).

The spelling of 20120220312011 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, three hundred twelve thousand, eleven".